Literature DB >> 26594437

Crystal structure of 5-di-ethyl-amino-2-({[4-(di-ethyl-amino)-phen-yl]imino}-meth-yl)phenol.

C Vidya Rani1, G Chakkaravarthi2, N Indra Gandhi3, G Rajagopal1.   

Abstract

In the title compound, C21H29N3O, the dihedral angle between the planes of the aromatic rings is 8.1 (2)°. The ethyl groups at one terminal site of the compound are disordered over two sets of sites with occupancies of 0.775 (9) and 0.225 (9). The mol-ecule has an E conformation about the N=C bond. The mol-ecular structure features an intra-molecular O-H⋯N hydrogen bond, which closes an S(6) loop. In the crystal, weak C-H⋯π inter-actions leads to the formation of a three-dimensional network.

Entities:  

Keywords:  C—H⋯π inter­actions; Schiff base; biological activity; crystal structure; intra­molecular hydrogen bond; pharmacological activity; phenol

Year:  2015        PMID: 26594437      PMCID: PMC4647405          DOI: 10.1107/S205698901501645X

Source DB:  PubMed          Journal:  Acta Crystallogr E Crystallogr Commun


Related literature

For biological and pharmacological activities of Schiff base compounds and their derivatives, see: Khandar et al. (2005 ▸); Chen et al. (2006 ▸); Kidwai et al. (2000 ▸). For similar structures, see: Manvizhi et al. (2011 ▸); Thirugnanasundar et al. (2011 ▸); Rani et al. (2015 ▸).

Experimental

Crystal data

C21H29N3O M = 339.47 Orthorhombic, a = 8.1986 (4) Å b = 9.7128 (4) Å c = 24.4172 (12) Å V = 1944.38 (16) Å3 Z = 4 Mo Kα radiation μ = 0.07 mm−1 T = 295 K 0.28 × 0.26 × 0.24 mm

Data collection

Bruker Kappa APEX II CCD diffractometer Absorption correction: multi-scan (SADABS; Sheldrick, 1996 ▸) T min = 0.980, T max = 0.983 29557 measured reflections 3556 independent reflections 2130 reflections with I > 2σ(I) R int = 0.046

Refinement

R[F 2 > 2σ(F 2)] = 0.064 wR(F 2) = 0.205 S = 1.07 3556 reflections 272 parameters 10 restraints H atoms treated by a mixture of independent and constrained refinement Δρmax = 0.44 e Å−3 Δρmin = −0.20 e Å−3

Data collection: APEX2 (Bruker, 2004 ▸); cell refinement: SAINT (Bruker, 2004 ▸); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▸); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▸); molecular graphics: PLATON (Spek, 2009 ▸); software used to prepare material for publication: SHELXL97 and PLATON (Spek, 2009 ▸). Crystal structure: contains datablock(s) global, I. DOI: 10.1107/S205698901501645X/rk2432sup1.cif Structure factors: contains datablock(s) I. DOI: 10.1107/S205698901501645X/rk2432Isup2.hkl Click here for additional data file. Supporting information file. DOI: 10.1107/S205698901501645X/rk2432Isup3.cml Click here for additional data file. 2 5 2 . DOI: 10.1107/S205698901501645X/rk2432fig1.tif The mol­ecular structure of title compaund, with the atom–numbering scheme. Displacement ellipsoids are drawn at the 30% probability level. H atoms are presented as a small spheres of arbitrary radius. The intra­molecular hydrogen bond is depicted by a dashed line. Only the major occupancy component of the disordered di­ethyl­amino–group [—N1(C2H5)2] is shown. CCDC reference: 1422036 Additional supporting information: crystallographic information; 3D view; checkCIF report
C21H29N3OF(000) = 736
Mr = 339.47Dx = 1.160 Mg m3
Orthorhombic, P212121Mo Kα radiation, λ = 0.71073 Å
Hall symbol: P 2ac 2abCell parameters from 7089 reflections
a = 8.1986 (4) Åθ = 2.5–25.3°
b = 9.7128 (4) ŵ = 0.07 mm1
c = 24.4172 (12) ÅT = 295 K
V = 1944.38 (16) Å3Block, colourless
Z = 40.28 × 0.26 × 0.24 mm
Bruker Kappa APEX II CCD diffractometer3556 independent reflections
Radiation source: fine–focus sealed tube2130 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.046
ω and φ scansθmax = 25.4°, θmin = 2.3°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)h = −9→9
Tmin = 0.980, Tmax = 0.983k = −11→11
29557 measured reflectionsl = −29→29
Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.064H atoms treated by a mixture of independent and constrained refinement
wR(F2) = 0.205w = 1/[σ2(Fo2) + (0.0727P)2 + 1.5032P] where P = (Fo2 + 2Fc2)/3
S = 1.07(Δ/σ)max < 0.001
3556 reflectionsΔρmax = 0.44 e Å3
272 parametersΔρmin = −0.20 e Å3
10 restraintsAbsolute structure: Flack (1983), 1466 Friedel pairs
Primary atom site location: structure-invariant direct methods
Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'s involving l.s. planes.
Refinement. Refinement of F2 against ALL reflections. The weighted R–factor wR and goodness of fit S are based on F2, conventional R–factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R–factors(gt) etc. and is not relevant to the choice of reflections for refinement. R–factors based on F2 are statistically about twice as large as those based on F, and R–factors based on ALL data will be even larger.
xyzUiso*/UeqOcc. (<1)
C10.7266 (10)0.9101 (7)−0.0244 (3)0.084 (2)0.775 (9)
H1A0.74110.86900.01110.125*0.775 (9)
H1B0.65380.9871−0.02140.125*0.775 (9)
H1C0.83020.9409−0.03800.125*0.775 (9)
C20.6555 (11)0.8049 (8)−0.0633 (4)0.067 (3)0.775 (9)
H2A0.55770.7651−0.04750.080*0.775 (9)
H2B0.62600.8492−0.09750.080*0.775 (9)
C30.9082 (10)0.7205 (8)−0.1156 (3)0.073 (2)0.775 (9)
H3A0.93750.8172−0.11610.088*0.775 (9)
H3B1.00470.6674−0.10650.088*0.775 (9)
C40.8438 (10)0.6778 (8)−0.1703 (3)0.093 (3)0.775 (9)
H4A0.82110.5809−0.16990.140*0.775 (9)
H4B0.92370.6975−0.19790.140*0.775 (9)
H4C0.74540.7277−0.17800.140*0.775 (9)
C1A0.586 (4)0.847 (5)−0.0615 (19)0.122 (16)0.225 (9)
H1A10.55210.9397−0.05450.183*0.225 (9)
H1A20.51930.7847−0.04050.183*0.225 (9)
H1A30.57300.8267−0.09980.183*0.225 (9)
C2A0.764 (4)0.8291 (15)−0.0453 (9)0.085 (9)0.225 (9)
H2A10.83450.8993−0.06070.102*0.225 (9)
H2A20.77980.8221−0.00610.102*0.225 (9)
C3A0.787 (3)0.6858 (16)−0.1341 (4)0.061 (7)0.225 (9)
H3A10.70190.7390−0.15190.073*0.225 (9)
H3A20.78240.5911−0.14670.073*0.225 (9)
C4A0.955 (3)0.749 (3)−0.1425 (13)0.080 (9)0.225 (9)
H4A10.94780.8474−0.13890.120*0.225 (9)
H4A20.99440.7263−0.17830.120*0.225 (9)
H4A31.02880.7136−0.11540.120*0.225 (9)
C50.7811 (6)0.5793 (4)−0.04177 (17)0.0666 (12)
C60.8764 (6)0.4644 (5)−0.05697 (19)0.0725 (13)
H60.93260.4651−0.09010.087*
C70.8865 (6)0.3522 (5)−0.02341 (19)0.0680 (12)
H70.95090.2782−0.03420.082*
C80.8054 (5)0.3444 (4)0.02559 (16)0.0541 (10)
C90.7068 (6)0.4550 (5)0.03971 (16)0.0613 (11)
C100.6941 (6)0.5712 (4)0.00699 (17)0.0662 (12)
H100.62740.64380.01770.079*
C110.8246 (6)0.2245 (5)0.06113 (19)0.0643 (12)
H110.89090.15220.04990.077*
C120.7727 (5)0.1017 (4)0.14256 (17)0.0574 (11)
C130.8522 (6)−0.0207 (5)0.12960 (18)0.0706 (13)
H130.9012−0.03060.09550.085*
C140.8591 (6)−0.1287 (5)0.16721 (18)0.0679 (12)
H140.9130−0.20940.15770.082*
C150.7872 (5)−0.1183 (4)0.21878 (16)0.0515 (10)
C160.7109 (5)0.0078 (4)0.23007 (17)0.0616 (11)
H160.66380.02100.26430.074*
C170.7033 (5)0.1122 (5)0.19253 (18)0.0622 (11)
H170.64870.19290.20170.075*
C180.8789 (6)−0.3514 (5)0.2453 (2)0.0726 (13)
H18A0.9128−0.39120.27990.087*
H18B0.9765−0.33060.22440.087*
C190.7787 (9)−0.4567 (6)0.2141 (2)0.109 (2)
H19A0.6855−0.48250.23560.164*
H19B0.8443−0.53660.20700.164*
H19C0.7429−0.41760.18010.164*
C200.7125 (6)−0.2143 (5)0.3091 (2)0.0764 (14)
H20A0.6822−0.30580.32130.092*
H20B0.6132−0.16070.30540.092*
C210.8191 (9)−0.1487 (7)0.3515 (2)0.113 (2)
H21A0.9208−0.19750.35350.170*
H21B0.7657−0.15210.38640.170*
H21C0.8393−0.05460.34170.170*
N10.7767 (7)0.6954 (4)−0.07378 (16)0.1047 (19)
N20.7542 (4)0.2174 (4)0.10594 (14)0.0626 (10)
N30.7918 (5)−0.2243 (4)0.25593 (14)0.0654 (10)
O10.6208 (5)0.4508 (4)0.08624 (14)0.0858 (11)
H10.643 (8)0.379 (4)0.105 (2)0.129*
U11U22U33U12U13U23
C10.091 (5)0.071 (5)0.089 (5)0.010 (4)0.006 (4)−0.013 (4)
C20.084 (8)0.057 (5)0.059 (4)0.014 (5)−0.005 (5)0.004 (3)
C30.081 (6)0.061 (4)0.078 (6)−0.007 (4)0.005 (4)0.004 (4)
C40.099 (6)0.105 (6)0.075 (5)0.017 (5)0.000 (4)−0.008 (4)
C1A0.11 (3)0.11 (3)0.15 (3)−0.01 (2)0.04 (3)0.01 (3)
C2A0.12 (3)0.08 (2)0.058 (16)−0.004 (18)−0.006 (17)0.015 (14)
C3A0.13 (2)0.021 (8)0.036 (11)0.008 (11)0.021 (12)0.000 (7)
C4A0.076 (17)0.080 (19)0.09 (2)−0.020 (14)0.023 (15)−0.010 (16)
C50.091 (3)0.054 (3)0.055 (2)0.012 (3)0.019 (3)0.003 (2)
C60.090 (4)0.061 (3)0.067 (3)0.008 (3)0.018 (3)−0.006 (2)
C70.075 (3)0.054 (3)0.075 (3)0.010 (2)0.004 (3)−0.005 (2)
C80.050 (2)0.048 (2)0.064 (3)0.000 (2)−0.010 (2)0.0036 (19)
C90.059 (2)0.071 (3)0.054 (2)−0.004 (2)0.0005 (17)0.001 (2)
C100.081 (3)0.059 (3)0.059 (2)0.017 (3)0.015 (2)0.005 (2)
C110.056 (3)0.071 (3)0.065 (3)−0.002 (2)−0.012 (2)−0.003 (2)
C120.052 (2)0.049 (2)0.071 (3)0.000 (2)−0.017 (2)0.010 (2)
C130.081 (3)0.080 (3)0.050 (2)−0.005 (3)−0.002 (2)0.002 (2)
C140.078 (3)0.061 (3)0.065 (3)0.013 (2)−0.007 (2)0.006 (2)
C150.051 (2)0.046 (2)0.058 (2)−0.002 (2)−0.011 (2)0.0053 (19)
C160.056 (2)0.062 (3)0.067 (3)0.001 (2)−0.003 (2)0.004 (2)
C170.056 (3)0.064 (3)0.067 (3)0.001 (2)−0.006 (2)0.002 (2)
C180.077 (3)0.063 (3)0.077 (3)0.015 (3)−0.004 (3)0.014 (3)
C190.144 (6)0.066 (3)0.116 (4)0.001 (4)−0.014 (5)−0.014 (3)
C200.073 (3)0.063 (3)0.093 (3)−0.001 (3)0.001 (3)0.018 (3)
C210.145 (6)0.123 (5)0.072 (3)−0.005 (5)−0.001 (4)−0.008 (3)
N10.176 (5)0.065 (3)0.072 (3)0.038 (3)0.061 (3)0.020 (2)
N20.061 (2)0.065 (2)0.061 (2)0.0032 (19)−0.0139 (19)−0.0030 (18)
N30.081 (2)0.054 (2)0.062 (2)0.011 (2)0.000 (2)0.0053 (17)
O10.105 (3)0.084 (2)0.068 (2)0.028 (2)0.0249 (18)0.0131 (18)
C1—C21.513 (8)C8—C91.388 (6)
C1—H1A0.9600C8—C111.461 (6)
C1—H1B0.9600C9—O11.338 (5)
C1—H1C0.9600C9—C101.387 (6)
C2—N11.478 (7)C10—H100.9300
C2—H2A0.9700C11—N21.239 (5)
C2—H2B0.9700C11—H110.9300
C3—C41.495 (7)C12—C171.350 (6)
C3—N11.504 (7)C12—C131.392 (6)
C3—H3A0.9700C12—N21.444 (5)
C3—H3B0.9700C13—C141.395 (6)
C4—H4A0.9600C13—H130.9300
C4—H4B0.9600C14—C151.394 (6)
C4—H4C0.9600C14—H140.9300
C1A—C2A1.523 (10)C15—N31.373 (5)
C1A—H1A10.9600C15—C161.403 (6)
C1A—H1A20.9600C16—C171.368 (6)
C1A—H1A30.9600C16—H160.9300
C2A—N11.477 (10)C17—H170.9300
C2A—H2A10.9700C18—N31.450 (5)
C2A—H2A20.9700C18—C191.516 (7)
C3A—N11.478 (9)C18—H18A0.9700
C3A—C4A1.524 (10)C18—H18B0.9700
C3A—H3A10.9700C19—H19A0.9600
C3A—H3A20.9700C19—H19B0.9600
C4A—H4A10.9600C19—H19C0.9600
C4A—H4A20.9600C20—N31.455 (6)
C4A—H4A30.9600C20—C211.497 (7)
C5—N11.372 (5)C20—H20A0.9700
C5—C101.390 (6)C20—H20B0.9700
C5—C61.412 (6)C21—H21A0.9600
C6—C71.366 (6)C21—H21B0.9600
C6—H60.9300C21—H21C0.9600
C7—C81.371 (6)O1—H10.86 (2)
C7—H70.9300
N1—C2—C1109.6 (7)C17—C12—C13117.8 (4)
N1—C2—H2A109.8C17—C12—N2117.2 (4)
C1—C2—H2A109.8C13—C12—N2125.0 (4)
N1—C2—H2B109.8C12—C13—C14120.8 (4)
C1—C2—H2B109.8C12—C13—H13119.6
H2A—C2—H2B108.2C14—C13—H13119.6
C4—C3—N1107.9 (7)C15—C14—C13121.5 (4)
C4—C3—H3A110.1C15—C14—H14119.2
N1—C3—H3A110.1C13—C14—H14119.2
C4—C3—H3B110.1N3—C15—C14122.1 (4)
N1—C3—H3B110.1N3—C15—C16122.5 (4)
H3A—C3—H3B108.4C14—C15—C16115.4 (4)
C2A—C1A—H1A1109.5C17—C16—C15122.4 (4)
C2A—C1A—H1A2109.5C17—C16—H16118.8
H1A1—C1A—H1A2109.5C15—C16—H16118.8
C2A—C1A—H1A3109.5C12—C17—C16122.0 (4)
H1A1—C1A—H1A3109.5C12—C17—H17119.0
H1A2—C1A—H1A3109.5C16—C17—H17119.0
N1—C2A—C1A93 (2)N3—C18—C19113.4 (4)
N1—C2A—H2A1113.2N3—C18—H18A108.9
C1A—C2A—H2A1113.2C19—C18—H18A108.9
N1—C2A—H2A2113.2N3—C18—H18B108.9
C1A—C2A—H2A2113.2C19—C18—H18B108.9
H2A1—C2A—H2A2110.5H18A—C18—H18B107.7
N1—C3A—C4A99.1 (15)C18—C19—H19A109.5
N1—C3A—H3A1111.9C18—C19—H19B109.5
C4A—C3A—H3A1111.9H19A—C19—H19B109.5
N1—C3A—H3A2111.9C18—C19—H19C109.5
C4A—C3A—H3A2111.9H19A—C19—H19C109.5
H3A1—C3A—H3A2109.6H19B—C19—H19C109.5
C3A—C4A—H4A1109.5N3—C20—C21112.6 (4)
C3A—C4A—H4A2109.5N3—C20—H20A109.1
H4A1—C4A—H4A2109.5C21—C20—H20A109.1
C3A—C4A—H4A3109.5N3—C20—H20B109.1
H4A1—C4A—H4A3109.5C21—C20—H20B109.1
H4A2—C4A—H4A3109.5H20A—C20—H20B107.8
N1—C5—C10121.4 (4)C20—C21—H21A109.5
N1—C5—C6120.9 (4)C20—C21—H21B109.5
C10—C5—C6117.7 (4)H21A—C21—H21B109.5
C7—C6—C5120.4 (4)C20—C21—H21C109.5
C7—C6—H6119.8H21A—C21—H21C109.5
C5—C6—H6119.8H21B—C21—H21C109.5
C6—C7—C8122.6 (4)C5—N1—C2A117.2 (10)
C6—C7—H7118.7C5—N1—C3A120.9 (7)
C8—C7—H7118.7C2A—N1—C3A121.9 (12)
C7—C8—C9117.2 (4)C5—N1—C2120.7 (5)
C7—C8—C11120.7 (4)C2A—N1—C240.3 (12)
C9—C8—C11122.1 (4)C3A—N1—C2104.8 (9)
O1—C9—C10118.3 (4)C5—N1—C3120.0 (5)
O1—C9—C8119.7 (4)C2A—N1—C3103.2 (12)
C10—C9—C8122.0 (4)C3A—N1—C345.1 (8)
C9—C10—C5120.1 (4)C2—N1—C3118.8 (6)
C9—C10—H10120.0C11—N2—C12122.8 (4)
C5—C10—H10120.0C15—N3—C18122.3 (4)
N2—C11—C8121.3 (4)C15—N3—C20121.8 (4)
N2—C11—H11119.4C18—N3—C20115.9 (4)
C8—C11—H11119.4C9—O1—H1112 (4)
N1—C5—C6—C7176.6 (5)C6—C5—N1—C2169.0 (6)
C10—C5—C6—C7−2.5 (8)C10—C5—N1—C3160.6 (5)
C5—C6—C7—C80.6 (8)C6—C5—N1—C3−18.5 (8)
C6—C7—C8—C91.8 (7)C1A—C2A—N1—C5−106 (2)
C6—C7—C8—C11−177.7 (4)C1A—C2A—N1—C3A75 (3)
C7—C8—C9—O1177.9 (4)C1A—C2A—N1—C20 (2)
C11—C8—C9—O1−2.7 (6)C1A—C2A—N1—C3120 (2)
C7—C8—C9—C10−2.2 (6)C4A—C3A—N1—C5−110.9 (14)
C11—C8—C9—C10177.2 (4)C4A—C3A—N1—C2A68 (2)
O1—C9—C10—C5−179.8 (4)C4A—C3A—N1—C2108.3 (15)
C8—C9—C10—C50.3 (7)C4A—C3A—N1—C3−7.8 (14)
N1—C5—C10—C9−177.1 (5)C1—C2—N1—C591.1 (9)
C6—C5—C10—C92.1 (7)C1—C2—N1—C2A−5.8 (16)
C7—C8—C11—N2178.7 (4)C1—C2—N1—C3A−128.1 (9)
C9—C8—C11—N2−0.8 (6)C1—C2—N1—C3−81.6 (8)
C17—C12—C13—C140.2 (6)C4—C3—N1—C599.5 (7)
N2—C12—C13—C14−177.9 (4)C4—C3—N1—C2A−127.9 (12)
C12—C13—C14—C150.0 (7)C4—C3—N1—C3A−5.7 (10)
C13—C14—C15—N3179.3 (4)C4—C3—N1—C2−87.8 (7)
C13—C14—C15—C16−1.0 (6)C8—C11—N2—C12−178.8 (4)
N3—C15—C16—C17−178.5 (4)C17—C12—N2—C11173.3 (4)
C14—C15—C16—C171.8 (6)C13—C12—N2—C11−8.6 (6)
C13—C12—C17—C160.7 (6)C14—C15—N3—C183.3 (7)
N2—C12—C17—C16178.9 (4)C16—C15—N3—C18−176.3 (4)
C15—C16—C17—C12−1.7 (7)C14—C15—N3—C20−178.2 (4)
C10—C5—N1—C2A34.3 (15)C16—C15—N3—C202.1 (6)
C6—C5—N1—C2A−144.8 (15)C19—C18—N3—C15−86.1 (5)
C10—C5—N1—C3A−146.5 (10)C19—C18—N3—C2095.3 (5)
C6—C5—N1—C3A34.4 (12)C21—C20—N3—C15−86.4 (6)
C10—C5—N1—C2−11.9 (9)C21—C20—N3—C1892.1 (5)
D—H···AD—HH···AD···AD—H···A
O1—H1···N20.86 (2)1.81 (4)2.563 (5)144 (6)
C18—H18A···Cg2i0.972.923.660 (5)134
C1A—H1A1···Cg1ii0.962.803.49 (4)130
Table 1

Hydrogen-bond geometry (, )

Cg1 and Cg2 are the centroids of the C5C10 and C12C17 rings, respectively.

DHA DHHA D A DHA
O1H1N20.86(2)1.81(4)2.563(5)144(6)
C18H18A Cg2i 0.972.923.660(5)134
C1AH1A1Cg1ii 0.962.803.49(4)130

Symmetry codes: (i) ; (ii) .

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