Literature DB >> 25995867

Crystal structure of 5-{3-[2,6-dimethyl-4-(5-methyl-1,2,4-oxa-diazol-3-yl)phen-oxy]prop-yl}-N-(11-hy-droxy-undec-yl)isoxazole-3-carboxamide hemihydrate.

K Salorinne1, T Lahtinen1.   

Abstract

The title compound, C29H42N4O5·0.5H2O, comprises four structural units. A flexible prop-yloxy unit in a gauche conformation, with a -C(H2)-C(H2)-C(H2)-O- torsion angle of -64.32 (18)°, connects an isoxazole ring and an approximately planar phenyl-oxa-diazole ring system [with a maxixmum devation of 0.061 (2) Å], which are oriented almost parallel to one another with a dihedral angle of 10.75 (7)°. Furthermore, a C11-alkyl chain with a terminal hy-droxy group links to the 3-position of the isoxazole ring via an amide bond. In the crystal, a half-occupancy solvent water mol-ecule connects to a neighbouring mol-ecule via an inter-molecular O-H⋯O(water) hydrogen bond to the C11-alkyl chain hy-droxy group.

Entities:  

Keywords:  WIN derivative; anti­viral; crystal structure; isoxazole; oxa­diazole

Year:  2015        PMID: 25995867      PMCID: PMC4420136          DOI: 10.1107/S2056989015007367

Source DB:  PubMed          Journal:  Acta Crystallogr E Crystallogr Commun


Chemical context

An anti­viral drug family of the so-called ‘WIN compounds’ was developed against various human illnesses caused by enteroviruses including common respiratory infections, rash or mild fever and serious or life-threatening infections, such as meningitis, myocarditis, encephalitis and paralytic poliomyelitis (De Palma et al., 2008 ▸; Diana, 2003 ▸). The WIN compounds were particularly designed to target the early events (attachment, entry and uncoating) of viral replication and they have been shown to bind specifically into the inter­ior hydro­phobic pocket located at the VP1 protein of the enterovirus capsid and replacing the naturally occurring myristic acid (Reisdorph et al., 2003 ▸; Giranda et al., 1995 ▸; Zhang et al., 2004 ▸; Thibaut et al., 2012 ▸). The anti­viral drug candidate development finally led to the WIN 63843 analogue, better known as Pleconaril, which showed a drastic decrease in the metabolic degradation of the mol­ecule and a broad range of anti­viral activity against enteroviruses (Pevear et al., 1999 ▸; Wildenbeest et al., 2012 ▸). The design of the title compound is based on the chemical structure of the WIN 61893 analogue (Diana et al., 1995 ▸), to which an additional C11-alkyl linker arm having a hy­droxy end group was attached at the 3-position of the isoxazole ring via an amide bond.

Structural commentary

The mol­ecular structure of the title compound is shown in Fig. 1 ▸. The structure contains three essentially planar heterocyclic or aromatic rings, i.e. isoxazole (atoms C19–C21/N22/O23), benzene (C7–C12) and oxa­diazole (C2/O3/N4/C5/N6), of which the latter two are directly connected via atoms C7 and C5. The three heterocyclic rings are approximately coplanar to one another, having dihedral angles between the rings of 11.57 (8) (C19–C21/N22/O23 and C7–C12), 10.68 (9) (C19–C21/N22/O23 and C2/O3/N4/C5/N6) and 4.81 (9)° (C7–C12 and C2/O3/N4/C5/N6), maintaining the WIN framework in a linear conformation. The dihedral angle between the isoxazole ring (C19–C21/N22/O23) and the approximately planar phenyl­oxa­diazole ring system [C7–C12/C2/O3/N4/C5/N6, with a maximum devation of 0.061 (2)Å for atom C12] is 10.75 (7)°. The isoxazole and phenyl­oxa­diazole ring systems are connected by a prop­yloxy unit (O15–C18), which is in a gauche conformation, with a C18C17—C16—O15 torsion angle of −64.32 (18)°. The amide group (N26–C24) at the 3-position of the isoxazole ring which joins the C11-alkyl chain (C27–O38) and the WIN framework is likewise almost coplanar with the isoxazole ring, with a dihedral angle of 10.92 (9)° between the amide (H26/N26/C24/O25) and isoxazole planes. The amide hydrogen (H26) and the acidic isoxazole hydrogen (H20) are on opposite sides, with a torsion angle (N26—C24—C21—C20) of 172.31 (15)°. The C11-alkyl chain (C27–C37) is in an all-anti conformation, with an average torsion angle of 178.80°. The WIN framework and the C11-linker arm structural units are aligned roughly in a 160° angle and the total length of the title mol­ecule measures up to 3.4 nm.
Figure 1

The mol­ecular structure of the title compound with the atom labelling. Displacement ellipsoids are drawn at the 50% probability level.

Supra­molecular features

The title compound packs in the crystal lattice in layers, in which the mol­ecules are held together by solvent-mediated O—H⋯O and C—H⋯O hydrogen bonds (motif 1), as well as C—H⋯N and C—H⋯O inter­molecular inter­actions between the heterocyclic isoxazole and phenyl­oxa­diazole units of neighbouring mol­ecules (motif 2) (Table 1 ▸). In the solvent-mediated assembly, an inter­molecular hydrogen-bonded network of the type (9) is formed between the C11-alkyl chain hy­droxy [O—H⋯O = 1.90 (1) Å], solvent water [O—H⋯O = 1.87 (1) Å], amide carbonyl and isoxazole hydrogen (C—H⋯O = 2.56 Å) groups of two parallel neighbouring mol­ecules (Fig. 2 ▸). In a similar manner, two pairs of C—H⋯N and C—H⋯O hydrogen bonds connect three opposite-facing neighbouring mol­ecules via R 2 2(8) and (16) loops between the isoxazole (C—H⋯O = 2.51 Å) and phenyl­oxa­diazole (C—H⋯O = 2.64 Å and C—H⋯N = 2.65 Å) groups (Fig. 2 ▸).
Table 1

Hydrogen-bond geometry (, )

DHA DHHA D A DHA
C28H28AO3i 0.992.643.2567(19)120
C20H20O38ii 0.952.563.505(2)175
C13H13BO23i 0.982.513.416(2)154
C1H1BN60.982.653.622(2)174
O100H10BO25iii 0.84(1)1.87(1)2.710(3)180(6)
O38H38O1000.82(1)1.90(1)2.695(4)164(2)

Symmetry codes: (i) ; (ii) ; (iii) .

Figure 2

A view along the c axis of the crystal packing of the title compound. Inter­molecular inter­actions formed between neighbouring mol­ecules highlighting the solvent water mediated hydrogen bonding network (motif 1, orange box) and the two coordination loops between the heterocyclic isoxazole and phenyl- oxa­diazole units (motif 2, blue box).

Database survey

A search of the Cambridge Structural Database (CSD; Version 5.36, November 2014; Groom & Allen, 2014 ▸) revealed the presence of nine structures (CSD refcode VOGDAY contains two independent mol­ecules; Salorinne et al., 2014 ▸) with the substructure 3-{3,5-dimethyl-4-[3-(3-methyl­isoxazol-5-yl)prop­oxy]phen­yl}-5-methyl-1,2,4-oxa­diazole. These nine structures belong to three similar compounds of 5-{3-[2,6-dimethyl-4-(5-methyl-1,2,4-oxa­diazol-3-yl)phen­oxy]prop­yl}iso­xazole-3-carb­oxy­lic acid (Salorinne et al., 2014 ▸), ethyl 5-{3-[2,6-dimethyl-4-(5-methyl-1,2,4-oxa­diazol-3-yl)phen­oxy]prop­yl}iso­xazole-3-carboxyl­ate (Salorinne et al., 2014 ▸) and 3-{3,5-di­methyl-4-[3-(3-methyl­isoxazol-5-yl)prop­oxy]phen­yl}-5-tri­fluoro­methyl-1,2,4-oxa­diazole (Coste et al., 2004 ▸). In six of the nine structures (CSD refcodes VOGCOL01, VOGDAY, HAJYUN, HAJYUN01, HAJYUN02 and HAJYUN03; Salorinne et al., 2014 ▸; Coste et al., 2004 ▸), the isoxazole and phenyl­oxa­diazole heterocyclic rings of the WIN framework are almost coplanar, similar to the title compound. However, in two of the structures (CSD refcodes VOGCOL and VOGDEL; Salorinne et al., 2014 ▸), the heterocyclic ring systems are tilted slightly with angles of 34–38° between the ring planes, whereas in one of the structures (CSD refcode VOGCOL; Salorinne et al., 2014 ▸), the heterocyclic ring systems are closer to a perpendicular orientation, with an angle of ca 60.8°. In all of the structures, the prop­yloxy unit is in a gauche conformation, with torsion angles in the range 62.4–69.2°.

Synthesis and crystallization

An amide coupling reaction of 5-{3-[2,6-dimethyl-4-(5-methyl-1,2,4-oxa­diazol-3-yl)phen­oxy]prop­yl}isoxazole-3-carb­oxy­lic acid (0.17 mmol, Salorinne et al., 2014 ▸) with 11-amino-1-undeca­nol (0.18 mmol) in di­chloro­methane (20 ml) in the presence of N-[3-(di­methyl­amino)­prop­yl]-N-ethyl­carbodi­imide (0.19 mmol) and a catalytic amount of 1-hy­droxy­benzotriazole at 273 K gave the title compound in 68% yield after subsequent chromatographic purification in silica with a di­chloro­methane–methanol mixture (95:5 v/v). Needle-like crystals of the title compound were obtained from an ethanol solution by vapor diffusion with water.

Refinement

Crystal data, data collection and structure refinement details are summarized in Table 2 ▸. All H atoms were positioned geometrically and allowed to ride on their parent atoms, with C—H = 0.95–0.99 Å, and with U iso(H) = 1.5U eq(C) for methyl and 1.2U eq(C) for other H atoms, and N—H = 0.88 Å and U iso(H) = 1.2U eq(N). The positions of the O-bound H atoms were located in a difference Fourier map and refined as riding atoms with U iso(H) = 1.5U eq(O). The O—H distance of the half-occupied water molecule was restrained to 0.84 (1) Å.
Table 2

Experimental details

Crystal data
Chemical formula2C29H42N4O5H2O
M r 1071.34
Crystal system, space groupTriclinic, P
Temperature (K)170
a, b, c ()6.7137(3), 14.0263(5), 16.6757(8)
, , ()113.889(4), 94.515(4), 90.976(4)
V (3)1429.29(12)
Z 1
Radiation typeMo K
(mm1)0.09
Crystal size (mm)0.42 0.15 0.09
 
Data collection
DiffractometerAgilent SuperNova, Single source at offset, Eos
Absorption correctionAnalytical [CrysAlis PRO (Agilent, 2013), based on expressions derived by Clark Reid (1995)]
T min, T max 0.990, 0.998
No. of measured, independent and observed [I > 2(I)] reflections13976, 7670, 5463
R int 0.016
(sin /)max (1)0.716
 
Refinement
R[F 2 > 2(F 2)], wR(F 2), S 0.053, 0.148, 1.05
No. of reflections7670
No. of parameters364
No. of restraints3
H-atom treatmentH atoms treated by a mixture of independent and constrained refinement
max, min (e 3)0.36, 0.26

Computer programs: CrysAlis PRO (Agilent, 2013 ▸), SHELXS97 (Sheldrick, 2008 ▸), SHELXL2013 (Sheldrick, 2015 ▸) and OLEX2 (Dolomanov et al., 2009 ▸).

Crystal structure: contains datablock(s) I. DOI: 10.1107/S2056989015007367/lh5758sup1.cif Structure factors: contains datablock(s) I. DOI: 10.1107/S2056989015007367/lh5758Isup2.hkl Click here for additional data file. Supporting information file. DOI: 10.1107/S2056989015007367/lh5758Isup3.cml CCDC reference: 1059505 Additional supporting information: crystallographic information; 3D view; checkCIF report Enhanced figure: interactive version of Fig. 3
2C29H42N4O5·H2OZ = 1
Mr = 1071.34F(000) = 578
Triclinic, P1Dx = 1.245 Mg m3
a = 6.7137 (3) ÅMo Kα radiation, λ = 0.71073 Å
b = 14.0263 (5) ÅCell parameters from 5261 reflections
c = 16.6757 (8) Åθ = 2.5–30.3°
α = 113.889 (4)°µ = 0.09 mm1
β = 94.515 (4)°T = 170 K
γ = 90.976 (4)°Needle, clear colourless
V = 1429.29 (12) Å30.42 × 0.15 × 0.09 mm
Agilent SuperNova, Single source at offset, Eos diffractometer7670 independent reflections
Radiation source: SuperNova (Mo) X-ray Source5463 reflections with I > 2σ(I)
Mirror monochromatorRint = 0.016
Detector resolution: 16.0107 pixels mm-1θmax = 30.6°, θmin = 2.5°
ω scansh = −8→9
Absorption correction: analytical [CrysAlis PRO (Agilent, 2013), based on expressions derived by Clark & Reid (1995)]k = −19→20
Tmin = 0.990, Tmax = 0.998l = −23→23
13976 measured reflections
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullHydrogen site location: mixed
R[F2 > 2σ(F2)] = 0.053H atoms treated by a mixture of independent and constrained refinement
wR(F2) = 0.148w = 1/[σ2(Fo2) + (0.0537P)2 + 0.3588P] where P = (Fo2 + 2Fc2)/3
S = 1.05(Δ/σ)max = 0.001
7670 reflectionsΔρmax = 0.36 e Å3
364 parametersΔρmin = −0.26 e Å3
3 restraints
Experimental. Absorption correction: [CrysAlisPro (Agilent, 2013). Analytical numeric absorption correction using a multifaceted crystal model based on expressions derived by Clark & Reid (1995)
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.
xyzUiso*/UeqOcc. (<1)
N260.4579 (2)0.58797 (10)0.29818 (9)0.0368 (3)
H260.51680.52820.27940.044*
O151.50948 (17)0.80964 (8)0.69521 (7)0.0345 (3)
O230.98187 (18)0.57258 (8)0.43787 (8)0.0419 (3)
C33−0.5511 (2)0.30398 (12)−0.11261 (10)0.0345 (4)
H33A−0.65040.3164−0.06910.041*
H33B−0.55190.3632−0.13050.041*
C280.1978 (2)0.49429 (12)0.17862 (10)0.0333 (3)
H28A0.20240.43470.19600.040*
H28B0.29440.48320.13420.040*
C270.2593 (2)0.59363 (13)0.25821 (10)0.0367 (4)
H27A0.25980.65310.24060.044*
H27B0.16070.60610.30210.044*
C35−0.8237 (3)0.20232 (12)−0.23541 (10)0.0364 (4)
H35A−0.83200.2614−0.25340.044*
H35B−0.92110.2122−0.19150.044*
O250.4853 (2)0.75915 (9)0.38872 (8)0.0472 (3)
C31−0.2796 (2)0.40101 (12)0.01197 (10)0.0333 (3)
H31A−0.37820.41290.05580.040*
H31B−0.28100.4607−0.00530.040*
C72.0845 (2)0.78185 (12)0.79254 (10)0.0327 (3)
C30−0.0726 (2)0.39840 (12)0.05502 (10)0.0337 (3)
H30A0.02670.38890.01190.040*
H30B−0.06980.33740.07070.040*
O32.54720 (19)0.71434 (9)0.87183 (8)0.0418 (3)
C32−0.3442 (2)0.30171 (12)−0.06881 (10)0.0348 (4)
H32A−0.34330.2421−0.05140.042*
H32B−0.24500.2897−0.11240.042*
C122.0006 (3)0.87875 (12)0.82186 (10)0.0365 (4)
H122.07470.93780.86530.044*
N62.3818 (2)0.85718 (11)0.90254 (9)0.0388 (3)
N42.3705 (2)0.68521 (11)0.81288 (9)0.0389 (3)
C29−0.0119 (2)0.49672 (12)0.13743 (10)0.0339 (3)
H29A−0.10900.50530.18130.041*
H29B−0.01780.55800.12220.041*
C101.7059 (2)0.80337 (12)0.72431 (10)0.0311 (3)
C34−0.6142 (2)0.20383 (12)−0.19294 (10)0.0357 (4)
H34A−0.51770.1933−0.23740.043*
H34B−0.60670.1444−0.17540.043*
C81.9776 (2)0.69561 (12)0.72722 (10)0.0323 (3)
H82.03530.62950.70650.039*
N220.7992 (2)0.55954 (11)0.38631 (9)0.0413 (4)
C91.7885 (2)0.70490 (12)0.69204 (10)0.0314 (3)
C240.5515 (2)0.67201 (12)0.36269 (10)0.0331 (3)
C36−0.8799 (3)0.10077 (13)−0.31550 (11)0.0409 (4)
H36A−0.78080.0904−0.35880.049*
H36B−0.87320.0420−0.29710.049*
C181.2226 (2)0.70293 (12)0.53997 (10)0.0337 (3)
H18A1.33080.67020.50250.040*
H18B1.21890.67370.58490.040*
C200.8824 (2)0.73138 (12)0.46614 (10)0.0313 (3)
H200.87420.80510.48950.038*
C52.2806 (2)0.77262 (12)0.83423 (10)0.0329 (3)
C210.7448 (2)0.65460 (12)0.40427 (10)0.0309 (3)
C111.8104 (3)0.89102 (12)0.78886 (10)0.0354 (4)
C37−1.0859 (3)0.09851 (13)−0.35931 (10)0.0387 (4)
H37A−1.18720.1026−0.31810.046*
H37B−1.09700.1597−0.37440.046*
C171.2696 (3)0.82027 (12)0.58603 (11)0.0380 (4)
H17A1.24540.85170.54280.046*
H17B1.17800.85110.63260.046*
C191.0283 (2)0.67627 (12)0.48446 (10)0.0314 (3)
C161.4831 (3)0.84709 (13)0.62690 (11)0.0380 (4)
H16A1.57660.81390.58170.046*
H16B1.51110.92360.65190.046*
C22.5404 (3)0.81666 (13)0.92158 (11)0.0374 (4)
C131.6694 (3)0.61197 (12)0.62341 (11)0.0401 (4)
H13A1.53760.60640.64310.060*
H13B1.74010.54840.61460.060*
H13C1.65280.62050.56780.060*
C12.7090 (3)0.86781 (15)0.98960 (12)0.0469 (4)
H1A2.70960.84021.03500.070*
H1B2.69340.94331.01650.070*
H1C2.83540.85370.96230.070*
C141.7185 (3)0.99591 (13)0.82549 (12)0.0475 (5)
H14A1.77981.03710.88540.071*
H14B1.57420.98570.82680.071*
H14C1.74191.03300.78800.071*
O100−1.4973 (6)−0.0308 (2)−0.5193 (2)0.0642 (9)0.5
H10A−1.586 (8)0.012 (4)−0.504 (4)0.096*0.5
H10B−1.503 (9)−0.0960 (10)−0.548 (3)0.096*0.5
O38−1.1236 (2)0.00445 (10)−0.43770 (9)0.0517 (4)
H38−1.238 (2)0.006 (2)−0.4585 (15)0.077*
U11U22U33U12U13U23
N260.0317 (8)0.0351 (7)0.0377 (7)0.0030 (6)−0.0097 (6)0.0109 (6)
O150.0290 (6)0.0373 (6)0.0372 (6)0.0034 (5)−0.0018 (5)0.0159 (5)
O230.0362 (7)0.0310 (6)0.0464 (7)0.0040 (5)−0.0147 (5)0.0066 (5)
C330.0279 (8)0.0327 (8)0.0349 (8)0.0021 (6)−0.0032 (6)0.0067 (6)
C280.0285 (8)0.0344 (8)0.0335 (8)0.0024 (6)−0.0040 (6)0.0114 (6)
C270.0296 (9)0.0393 (9)0.0353 (8)0.0039 (7)−0.0063 (7)0.0109 (7)
C350.0291 (8)0.0341 (8)0.0362 (8)0.0043 (7)−0.0038 (7)0.0055 (6)
O250.0417 (7)0.0386 (6)0.0514 (7)0.0096 (6)−0.0092 (6)0.0104 (5)
C310.0280 (8)0.0327 (8)0.0331 (8)0.0018 (6)−0.0032 (6)0.0084 (6)
C70.0304 (8)0.0343 (8)0.0336 (8)0.0039 (6)0.0003 (6)0.0145 (6)
C300.0291 (8)0.0341 (8)0.0335 (8)0.0019 (6)−0.0024 (6)0.0102 (6)
O30.0372 (7)0.0394 (6)0.0455 (7)0.0085 (5)−0.0034 (5)0.0150 (5)
C320.0298 (9)0.0353 (8)0.0314 (8)0.0017 (7)−0.0030 (6)0.0064 (6)
C120.0367 (9)0.0308 (8)0.0366 (8)0.0010 (7)−0.0048 (7)0.0098 (6)
N60.0373 (8)0.0369 (7)0.0375 (7)0.0054 (6)−0.0039 (6)0.0114 (6)
N40.0345 (8)0.0379 (7)0.0417 (7)0.0047 (6)−0.0034 (6)0.0147 (6)
C290.0281 (8)0.0343 (8)0.0329 (8)0.0011 (6)−0.0047 (6)0.0086 (6)
C100.0285 (8)0.0327 (8)0.0316 (7)0.0034 (6)−0.0004 (6)0.0133 (6)
C340.0293 (8)0.0344 (8)0.0328 (8)0.0055 (7)−0.0035 (6)0.0038 (6)
C80.0329 (9)0.0300 (7)0.0334 (8)0.0051 (6)0.0029 (6)0.0120 (6)
N220.0348 (8)0.0352 (7)0.0421 (8)0.0040 (6)−0.0131 (6)0.0067 (6)
C90.0326 (9)0.0304 (7)0.0302 (7)0.0017 (6)0.0009 (6)0.0116 (6)
C240.0301 (8)0.0370 (8)0.0314 (7)0.0006 (7)−0.0029 (6)0.0141 (6)
C360.0328 (9)0.0357 (8)0.0389 (9)0.0042 (7)−0.0078 (7)0.0013 (7)
C180.0278 (8)0.0345 (8)0.0339 (8)0.0029 (6)−0.0032 (6)0.0099 (6)
C200.0287 (8)0.0297 (7)0.0320 (7)0.0015 (6)−0.0006 (6)0.0095 (6)
C50.0321 (9)0.0341 (8)0.0334 (8)0.0039 (7)0.0025 (6)0.0147 (6)
C210.0277 (8)0.0329 (8)0.0294 (7)0.0026 (6)−0.0012 (6)0.0106 (6)
C110.0355 (9)0.0298 (7)0.0373 (8)0.0041 (7)−0.0022 (7)0.0110 (6)
C370.0308 (9)0.0386 (9)0.0355 (8)0.0003 (7)−0.0039 (7)0.0049 (7)
C170.0330 (9)0.0354 (8)0.0414 (9)0.0001 (7)−0.0076 (7)0.0134 (7)
C190.0292 (8)0.0302 (7)0.0302 (7)0.0025 (6)−0.0008 (6)0.0082 (6)
C160.0351 (9)0.0383 (8)0.0413 (9)−0.0027 (7)−0.0082 (7)0.0192 (7)
C20.0366 (9)0.0378 (8)0.0367 (8)0.0060 (7)0.0005 (7)0.0143 (7)
C130.0367 (10)0.0320 (8)0.0429 (9)0.0028 (7)−0.0029 (7)0.0076 (7)
C10.0397 (10)0.0508 (10)0.0451 (10)0.0044 (8)−0.0072 (8)0.0164 (8)
C140.0488 (12)0.0321 (8)0.0512 (10)0.0087 (8)−0.0088 (9)0.0085 (7)
O1000.0418 (18)0.0401 (18)0.085 (3)−0.0014 (17)−0.0171 (18)0.0032 (16)
O380.0355 (7)0.0480 (7)0.0479 (7)−0.0014 (6)−0.0147 (6)−0.0013 (6)
N26—H260.8800C10—C91.406 (2)
N26—C271.4614 (19)C10—C111.394 (2)
N26—C241.3352 (19)C34—H34A0.9900
O15—C101.3854 (18)C34—H34B0.9900
O15—C161.4356 (19)C8—H80.9500
O23—N221.4056 (17)C8—C91.387 (2)
O23—C191.3591 (18)N22—C211.308 (2)
C33—H33A0.9900C9—C131.504 (2)
C33—H33B0.9900C24—C211.494 (2)
C33—C321.525 (2)C36—H36A0.9900
C33—C341.521 (2)C36—H36B0.9900
C28—H28A0.9900C36—C371.506 (2)
C28—H28B0.9900C18—H18A0.9900
C28—C271.507 (2)C18—H18B0.9900
C28—C291.524 (2)C18—C171.523 (2)
C27—H27A0.9900C18—C191.487 (2)
C27—H27B0.9900C20—H200.9500
C35—H35A0.9900C20—C211.412 (2)
C35—H35B0.9900C20—C191.349 (2)
C35—C341.520 (2)C11—C141.510 (2)
C35—C361.522 (2)C37—H37A0.9900
O25—C241.2242 (19)C37—H37B0.9900
C31—H31A0.9900C37—O381.4329 (19)
C31—H31B0.9900C17—H17A0.9900
C31—C301.521 (2)C17—H17B0.9900
C31—C321.520 (2)C17—C161.510 (2)
C7—C121.391 (2)C16—H16A0.9900
C7—C81.394 (2)C16—H16B0.9900
C7—C51.473 (2)C2—C11.481 (2)
C30—H30A0.9900C13—H13A0.9800
C30—H30B0.9900C13—H13B0.9800
C30—C291.521 (2)C13—H13C0.9800
O3—N41.4194 (18)C1—H1A0.9800
O3—C21.339 (2)C1—H1B0.9800
C32—H32A0.9900C1—H1C0.9800
C32—H32B0.9900C14—H14A0.9800
C12—H120.9500C14—H14B0.9800
C12—C111.392 (2)C14—H14C0.9800
N6—C51.387 (2)O100—O100i0.847 (5)
N6—C21.293 (2)O100—H10A0.834 (10)
N4—C51.304 (2)O100—H10B0.841 (10)
C29—H29A0.9900O38—H380.819 (10)
C29—H29B0.9900
C27—N26—H26119.5C8—C9—C10118.41 (14)
C24—N26—H26119.5C8—C9—C13121.52 (14)
C24—N26—C27121.03 (13)N26—C24—C21116.22 (14)
C10—O15—C16115.72 (13)O25—C24—N26123.45 (15)
C19—O23—N22109.09 (11)O25—C24—C21120.32 (14)
H33A—C33—H33B107.7C35—C36—H36A108.9
C32—C33—H33A108.9C35—C36—H36B108.9
C32—C33—H33B108.9H36A—C36—H36B107.7
C34—C33—H33A108.9C37—C36—C35113.23 (14)
C34—C33—H33B108.9C37—C36—H36A108.9
C34—C33—C32113.38 (13)C37—C36—H36B108.9
H28A—C28—H28B107.9H18A—C18—H18B107.8
C27—C28—H28A109.1C17—C18—H18A109.1
C27—C28—H28B109.1C17—C18—H18B109.1
C27—C28—C29112.36 (13)C19—C18—H18A109.1
C29—C28—H28A109.1C19—C18—H18B109.1
C29—C28—H28B109.1C19—C18—C17112.46 (13)
N26—C27—C28111.29 (13)C21—C20—H20127.9
N26—C27—H27A109.4C19—C20—H20127.9
N26—C27—H27B109.4C19—C20—C21104.27 (13)
C28—C27—H27A109.4N6—C5—C7121.88 (14)
C28—C27—H27B109.4N4—C5—C7123.71 (14)
H27A—C27—H27B108.0N4—C5—N6114.37 (14)
H35A—C35—H35B107.8N22—C21—C24120.05 (14)
C34—C35—H35A109.1N22—C21—C20112.71 (14)
C34—C35—H35B109.1C20—C21—C24127.21 (14)
C34—C35—C36112.48 (13)C12—C11—C10118.13 (14)
C36—C35—H35A109.1C12—C11—C14120.24 (15)
C36—C35—H35B109.1C10—C11—C14121.58 (15)
H31A—C31—H31B107.7C36—C37—H37A109.6
C30—C31—H31A108.8C36—C37—H37B109.6
C30—C31—H31B108.8H37A—C37—H37B108.1
C32—C31—H31A108.8O38—C37—C36110.40 (13)
C32—C31—H31B108.8O38—C37—H37A109.6
C32—C31—C30113.69 (13)O38—C37—H37B109.6
C12—C7—C8119.31 (15)C18—C17—H17A109.1
C12—C7—C5118.79 (14)C18—C17—H17B109.1
C8—C7—C5121.86 (14)H17A—C17—H17B107.8
C31—C30—H30A108.9C16—C17—C18112.46 (14)
C31—C30—H30B108.9C16—C17—H17A109.1
C31—C30—C29113.32 (13)C16—C17—H17B109.1
H30A—C30—H30B107.7O23—C19—C18115.49 (13)
C29—C30—H30A108.9C20—C19—O23109.31 (13)
C29—C30—H30B108.9C20—C19—C18135.17 (14)
C2—O3—N4106.40 (12)O15—C16—C17108.21 (14)
C33—C32—H32A108.8O15—C16—H16A110.1
C33—C32—H32B108.8O15—C16—H16B110.1
C31—C32—C33113.98 (13)C17—C16—H16A110.1
C31—C32—H32A108.8C17—C16—H16B110.1
C31—C32—H32B108.8H16A—C16—H16B108.4
H32A—C32—H32B107.7O3—C2—C1117.70 (15)
C7—C12—H12119.3N6—C2—O3113.45 (15)
C7—C12—C11121.41 (15)N6—C2—C1128.85 (16)
C11—C12—H12119.3C9—C13—H13A109.5
C2—N6—C5102.68 (13)C9—C13—H13B109.5
C5—N4—O3103.10 (12)C9—C13—H13C109.5
C28—C29—H29A109.0H13A—C13—H13B109.5
C28—C29—H29B109.0H13A—C13—H13C109.5
C30—C29—C28112.80 (13)H13B—C13—H13C109.5
C30—C29—H29A109.0C2—C1—H1A109.5
C30—C29—H29B109.0C2—C1—H1B109.5
H29A—C29—H29B107.8C2—C1—H1C109.5
O15—C10—C9117.88 (13)H1A—C1—H1B109.5
O15—C10—C11120.18 (14)H1A—C1—H1C109.5
C11—C10—C9121.74 (14)H1B—C1—H1C109.5
C33—C34—H34A108.7C11—C14—H14A109.5
C33—C34—H34B108.7C11—C14—H14B109.5
C35—C34—C33114.39 (13)C11—C14—H14C109.5
C35—C34—H34A108.7H14A—C14—H14B109.5
C35—C34—H34B108.7H14A—C14—H14C109.5
H34A—C34—H34B107.6H14B—C14—H14C109.5
C7—C8—H8119.5O100i—O100—H10A45 (5)
C9—C8—C7120.98 (14)O100i—O100—H10B166 (4)
C9—C8—H8119.5H10A—O100—H10B132 (6)
C21—N22—O23104.61 (12)C37—O38—H38107.1 (18)
C10—C9—C13120.03 (14)
N26—C24—C21—N22−9.9 (2)C34—C33—C32—C31−179.60 (14)
N26—C24—C21—C20172.31 (15)C34—C35—C36—C37−179.10 (15)
O15—C10—C9—C8−173.62 (14)C8—C7—C12—C111.5 (3)
O15—C10—C9—C134.2 (2)C8—C7—C5—N6−176.35 (15)
O15—C10—C11—C12174.16 (14)C8—C7—C5—N41.3 (3)
O15—C10—C11—C14−3.2 (3)N22—O23—C19—C18−177.78 (14)
O23—N22—C21—C24−178.41 (14)N22—O23—C19—C200.63 (18)
O23—N22—C21—C20−0.32 (19)C9—C10—C11—C12−0.6 (2)
C27—N26—C24—O25−4.6 (3)C9—C10—C11—C14−177.98 (16)
C27—N26—C24—C21174.35 (14)C24—N26—C27—C28171.58 (14)
C27—C28—C29—C30177.88 (14)C36—C35—C34—C33179.91 (15)
C35—C36—C37—O38175.68 (15)C18—C17—C16—O15−64.32 (18)
O25—C24—C21—N22169.10 (16)C5—C7—C12—C11−175.97 (15)
O25—C24—C21—C20−8.7 (3)C5—C7—C8—C9176.58 (15)
C31—C30—C29—C28−178.56 (14)C5—N6—C2—O3−0.4 (2)
C7—C12—C11—C10−0.8 (3)C5—N6—C2—C1179.90 (18)
C7—C12—C11—C14176.62 (17)C21—C20—C19—O23−0.78 (18)
C7—C8—C9—C10−0.5 (2)C21—C20—C19—C18177.18 (18)
C7—C8—C9—C13−178.27 (15)C11—C10—C9—C81.2 (2)
C30—C31—C32—C33−179.69 (14)C11—C10—C9—C13179.01 (15)
O3—N4—C5—C7−178.08 (14)C17—C18—C19—O23176.76 (14)
O3—N4—C5—N6−0.30 (19)C17—C18—C19—C20−1.1 (3)
C32—C33—C34—C35177.44 (14)C19—O23—N22—C21−0.18 (18)
C32—C31—C30—C29−178.21 (14)C19—C18—C17—C16−168.20 (14)
C12—C7—C8—C9−0.8 (2)C19—C20—C21—N220.69 (19)
C12—C7—C5—N61.1 (2)C19—C20—C21—C24178.63 (16)
C12—C7—C5—N4178.67 (16)C16—O15—C10—C9−100.42 (16)
N4—O3—C2—N60.2 (2)C16—O15—C10—C1184.64 (18)
N4—O3—C2—C1179.98 (15)C2—O3—N4—C50.04 (17)
C29—C28—C27—N26178.10 (14)C2—N6—C5—C7178.26 (15)
C10—O15—C16—C17164.12 (13)C2—N6—C5—N40.4 (2)
D—H···AD—HH···AD···AD—H···A
C28—H28A···O3ii0.992.643.2567 (19)120
C20—H20···O38iii0.952.563.505 (2)175
C13—H13B···O23ii0.982.513.416 (2)154
C1—H1B···N60.982.653.622 (2)174
O100—H10B···O25iv0.84 (1)1.87 (1)2.710 (3)180 (6)
O38—H38···O1000.82 (1)1.90 (1)2.695 (4)164 (2)
  9 in total

1.  A short history of SHELX.

Authors:  George M Sheldrick
Journal:  Acta Crystallogr A       Date:  2007-12-21       Impact factor: 2.290

2.  The Cambridge Structural Database in retrospect and prospect.

Authors:  Colin R Groom; Frank H Allen
Journal:  Angew Chem Int Ed Engl       Date:  2014-01-02       Impact factor: 15.336

Review 3.  Combating enterovirus replication: state-of-the-art on antiviral research.

Authors:  Hendrik Jan Thibaut; Armando M De Palma; Johan Neyts
Journal:  Biochem Pharmacol       Date:  2011-08-26       Impact factor: 5.858

4.  Activity of pleconaril against enteroviruses.

Authors:  D C Pevear; T M Tull; M E Seipel; J M Groarke
Journal:  Antimicrob Agents Chemother       Date:  1999-09       Impact factor: 5.191

5.  Human rhinovirus capsid dynamics is controlled by canyon flexibility.

Authors:  Nichole Reisdorph; John J Thomas; Umesh Katpally; Elaine Chase; Ken Harris; Gary Siuzdak; Thomas J Smith
Journal:  Virology       Date:  2003-09-15       Impact factor: 3.616

Review 6.  Selective inhibitors of picornavirus replication.

Authors:  Armando M De Palma; Inge Vliegen; Erik De Clercq; Johan Neyts
Journal:  Med Res Rev       Date:  2008-11       Impact factor: 12.944

7.  Structural and virological studies of the stages of virus replication that are affected by antirhinovirus compounds.

Authors:  Ying Zhang; Alan A Simpson; Rebecca M Ledford; Carol M Bator; Sugoto Chakravarty; Gregory A Skochko; Tina M Demenczuk; Adiba Watanyar; Daniel C Pevear; Michael G Rossmann
Journal:  J Virol       Date:  2004-10       Impact factor: 5.103

8.  Structures of four methyltetrazole-containing antiviral compounds in human rhinovirus serotype 14.

Authors:  V L Giranda; G R Russo; P J Felock; T R Bailey; T Draper; D J Aldous; J Guiles; F J Dutko; G D Diana; D C Pevear; M McMillan
Journal:  Acta Crystallogr D Biol Crystallogr       Date:  1995-07-01

9.  Crystal structure refinement with SHELXL.

Authors:  George M Sheldrick
Journal:  Acta Crystallogr C Struct Chem       Date:  2015-01-01       Impact factor: 1.172

  9 in total

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