Literature DB >> 21580698

Absolute configuration of isoeichlerialactone.

Hoong-Kun Fun, Nantiya Joycharat, Supayang Piyawan Voravuthikunchai, Suchada Chantrapromma.   

Abstract

The title seco-dammarane triterpenoid, C(27)H(42)O(4) (systematic name: 3-{(3S,3aR,5aR,6S,7S,9aR,9bR)-6,9a,9b-trimethyl-3-[(R)-2-methyl-5-oxotetra-hydro-furan-2-yl]-7-(prop-1-en-2-yl)dodeca-hydro-1H-cyclo-penta-[a]naphthalen-6-yl}propanoic acid), has been isolated for the first time from the seeds of Aglaia forbesii. The mol-ecule has three fused rings and all rings are in trans-fused. The two cyclo-hexane rings are in standard chair conformations and the cyclo-pentane ring adopts an envelope conformation. Its absolute configuration was determined by the refinement of the Flack parameter to 0.26 (17). In the crystal, mol-ecules are linked into chains along [010] by O-H⋯O hydrogen bonds.

Entities:  

Year:  2010        PMID: 21580698      PMCID: PMC2984085          DOI: 10.1107/S1600536810009499

Source DB:  PubMed          Journal:  Acta Crystallogr Sect E Struct Rep Online        ISSN: 1600-5368


Related literature

For details of ring conformations, see: Cremer & Pople (1975 ▶). For bond-length data, see: Allen et al. (1987 ▶). For background to triterpenes and their biological activity, see: Engelmeier et al. (2000 ▶); Greger et al. (2001 ▶); Joycharat et al. (2008 ▶, 2010 ▶); Kim et al. (2006 ▶); Proksch et al. (2005 ▶). For a related structure, see: Singh & Aalbersberg (1992 ▶). For the stability of the temperature controller used in the data collection, see: Cosier & Glazer, (1986 ▶).

Experimental

Crystal data

C27H42O4 M = 430.61 Monoclinic, a = 11.8690 (4) Å b = 7.0388 (3) Å c = 14.1173 (5) Å β = 94.962 (2)° V = 1174.99 (8) Å3 Z = 2 Cu Kα radiation μ = 0.63 mm−1 T = 100 K 0.56 × 0.14 × 0.06 mm

Data collection

Bruker APEX DUO CCD area-detector diffractometer Absorption correction: multi-scan (SADABS; Bruker, 2009 ▶) T min = 0.720, T max = 0.962 29402 measured reflections 3253 independent reflections 3209 reflections with I > 2σ(I) R int = 0.045

Refinement

R[F 2 > 2σ(F 2)] = 0.029 wR(F 2) = 0.076 S = 1.05 3253 reflections 286 parameters 1 restraint H-atom parameters constrained Δρmax = 0.20 e Å−3 Δρmin = −0.19 e Å−3 Absolute structure: Flack (1983 ▶), 1258 Friedel pairs Flack parameter: 0.26 (17) Data collection: APEX2 (Bruker, 2009 ▶); cell refinement: SAINT (Bruker, 2009 ▶); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009 ▶). Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536810009499/rz2425sup1.cif Structure factors: contains datablocks I. DOI: 10.1107/S1600536810009499/rz2425Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report
C27H42O4F(000) = 472
Mr = 430.61Dx = 1.217 Mg m3
Monoclinic, P21Cu Kα radiation, λ = 1.54178 Å
Hall symbol: P 2ybCell parameters from 3253 reflections
a = 11.8690 (4) Åθ = 3.1–63.5°
b = 7.0388 (3) ŵ = 0.63 mm1
c = 14.1173 (5) ÅT = 100 K
β = 94.962 (2)°Needle, colourless
V = 1174.99 (8) Å30.56 × 0.14 × 0.06 mm
Z = 2
Bruker APEX DUO CCD area-detector diffractometer3253 independent reflections
Radiation source: sealed tube3209 reflections with I > 2σ(I)
graphiteRint = 0.045
φ and ω scansθmax = 63.5°, θmin = 3.1°
Absorption correction: multi-scan (SADABS; Bruker, 2009)h = −13→13
Tmin = 0.720, Tmax = 0.962k = −6→7
29402 measured reflectionsl = −16→16
Refinement on F2Hydrogen site location: inferred from neighbouring sites
Least-squares matrix: fullH-atom parameters constrained
R[F2 > 2σ(F2)] = 0.029w = 1/[σ2(Fo2) + (0.0429P)2 + 0.3283P] where P = (Fo2 + 2Fc2)/3
wR(F2) = 0.076(Δ/σ)max = 0.001
S = 1.05Δρmax = 0.20 e Å3
3253 reflectionsΔρmin = −0.19 e Å3
286 parametersExtinction correction: SHELXTL (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
1 restraintExtinction coefficient: 0.0060 (7)
Primary atom site location: structure-invariant direct methodsAbsolute structure: Flack (1983), 1258 Friedel pairs
Secondary atom site location: difference Fourier mapFlack parameter: 0.26 (17)
Experimental. The crystal was placed in the cold stream of an Oxford Cryosystems Cobra open-flow nitrogen cryostat (Cosier & Glazer, 1986) operating at 100.0 (1) K.
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds 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 > 2sigma(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*/Ueq
O11.02039 (9)0.12899 (19)0.98069 (8)0.0230 (3)
O20.87449 (10)−0.06457 (19)0.94649 (9)0.0269 (3)
H1O20.9144−0.13700.98020.040*
O30.85383 (10)0.17561 (19)0.33396 (8)0.0233 (3)
O40.92934 (11)−0.0534 (2)0.24954 (9)0.0311 (3)
C10.73873 (13)0.1943 (3)0.85206 (11)0.0165 (4)
H1A0.70300.17860.91080.020*
H1B0.73590.07210.82020.020*
C20.86329 (13)0.2436 (3)0.87797 (11)0.0182 (4)
H2A0.90050.25690.81980.022*
H2B0.86740.36560.91010.022*
C30.92647 (13)0.0998 (3)0.94034 (11)0.0181 (4)
C40.60276 (14)0.5092 (3)0.93919 (11)0.0220 (4)
C50.65278 (13)0.5261 (3)0.84351 (11)0.0180 (4)
H5A0.72960.57540.85760.022*
C60.58968 (13)0.6758 (3)0.78086 (11)0.0183 (4)
H6A0.58250.79120.81740.022*
H6B0.51420.63010.76120.022*
C70.65149 (14)0.7207 (3)0.69250 (11)0.0190 (4)
H7A0.72410.77760.71250.023*
H7B0.60780.81310.65390.023*
C80.67072 (12)0.5444 (3)0.63145 (11)0.0162 (4)
C90.72743 (13)0.3854 (3)0.69732 (11)0.0150 (4)
H9A0.80000.44010.72220.018*
C100.66594 (13)0.3357 (3)0.78849 (11)0.0163 (4)
C110.75991 (13)0.2106 (3)0.64025 (11)0.0178 (4)
H11A0.69150.15050.61200.021*
H11B0.79870.11980.68330.021*
C120.83640 (13)0.2598 (3)0.56117 (11)0.0182 (4)
H12A0.90900.30550.58900.022*
H12B0.84920.14740.52380.022*
C130.77909 (13)0.4124 (3)0.49785 (11)0.0164 (4)
H13A0.70550.36110.47330.020*
C140.75490 (12)0.5929 (3)0.55434 (11)0.0167 (4)
C150.71234 (13)0.7261 (3)0.47270 (11)0.0195 (4)
H15A0.71260.85740.49360.023*
H15B0.63650.69200.44720.023*
C160.79861 (14)0.6939 (3)0.39867 (12)0.0230 (4)
H16A0.86250.77940.41010.028*
H16B0.76380.71560.33490.028*
C170.83734 (13)0.4841 (3)0.41098 (11)0.0185 (4)
H17A0.91920.48310.42750.022*
C180.86642 (13)0.6806 (3)0.59992 (11)0.0185 (4)
H18A0.92530.66230.55830.028*
H18B0.88720.61980.65980.028*
H18C0.85580.81410.60990.028*
C190.55240 (13)0.2318 (3)0.76682 (11)0.0184 (4)
H19A0.53120.17100.82350.028*
H19B0.56000.13790.71850.028*
H19C0.49520.32180.74500.028*
C200.81270 (14)0.3722 (3)0.31846 (11)0.0198 (4)
C210.88153 (15)0.4451 (3)0.23872 (12)0.0256 (4)
H21A0.83880.53710.19910.031*
H21B0.95190.50270.26440.031*
C220.90316 (16)0.2656 (3)0.18336 (13)0.0312 (5)
H22A0.84550.24810.13110.037*
H22B0.97670.27010.15830.037*
C230.89845 (14)0.1082 (3)0.25590 (12)0.0246 (4)
C240.68744 (15)0.3543 (3)0.28607 (12)0.0306 (5)
H24A0.65030.28290.33220.046*
H24B0.67860.29020.22590.046*
H24C0.65440.47870.27970.046*
C250.67355 (16)0.5249 (3)1.02112 (12)0.0328 (5)
H25A0.64380.52501.07990.039*
H25B0.75120.53541.01780.039*
C260.48110 (15)0.4927 (3)0.94372 (13)0.0288 (5)
H26A0.46540.46261.00760.043*
H26B0.45220.39380.90160.043*
H26C0.44550.61100.92500.043*
C270.55534 (13)0.4831 (3)0.58199 (11)0.0198 (4)
H27A0.49900.48810.62680.030*
H27B0.56080.35570.55850.030*
H27C0.53450.56730.52990.030*
U11U22U33U12U13U23
O10.0221 (6)0.0222 (8)0.0237 (6)0.0001 (5)−0.0039 (5)−0.0002 (5)
O20.0239 (6)0.0207 (8)0.0348 (7)−0.0002 (6)−0.0052 (5)0.0082 (6)
O30.0287 (6)0.0248 (9)0.0170 (6)−0.0003 (5)0.0044 (5)−0.0021 (5)
O40.0385 (7)0.0257 (10)0.0308 (7)−0.0002 (6)0.0136 (5)−0.0034 (6)
C10.0192 (8)0.0153 (10)0.0153 (7)−0.0003 (7)0.0036 (6)−0.0009 (7)
C20.0209 (8)0.0166 (11)0.0172 (8)0.0013 (7)0.0019 (6)0.0010 (7)
C30.0206 (8)0.0183 (11)0.0159 (8)0.0003 (7)0.0044 (6)−0.0020 (7)
C40.0322 (9)0.0147 (11)0.0201 (8)0.0067 (8)0.0082 (7)0.0009 (8)
C50.0178 (7)0.0186 (11)0.0176 (8)−0.0009 (7)0.0017 (6)−0.0003 (7)
C60.0213 (8)0.0156 (11)0.0187 (8)0.0005 (7)0.0054 (6)−0.0025 (7)
C70.0215 (8)0.0166 (11)0.0190 (8)0.0019 (7)0.0028 (6)0.0036 (7)
C80.0172 (8)0.0165 (11)0.0150 (8)0.0007 (7)0.0024 (6)0.0010 (7)
C90.0151 (7)0.0138 (11)0.0159 (7)0.0004 (7)0.0004 (6)0.0006 (7)
C100.0161 (8)0.0166 (11)0.0161 (7)0.0002 (7)0.0015 (6)0.0010 (7)
C110.0217 (8)0.0154 (11)0.0167 (8)0.0007 (7)0.0030 (6)0.0007 (7)
C120.0210 (8)0.0172 (11)0.0169 (8)0.0012 (7)0.0040 (6)−0.0022 (7)
C130.0165 (8)0.0171 (11)0.0157 (7)−0.0001 (7)0.0025 (6)0.0005 (7)
C140.0164 (7)0.0183 (11)0.0156 (8)−0.0003 (7)0.0020 (6)0.0016 (7)
C150.0226 (8)0.0164 (11)0.0198 (8)0.0009 (7)0.0028 (6)0.0020 (7)
C160.0274 (9)0.0225 (12)0.0196 (8)0.0005 (8)0.0054 (7)0.0049 (8)
C170.0167 (8)0.0223 (12)0.0165 (8)−0.0003 (7)0.0026 (6)0.0011 (7)
C180.0206 (8)0.0156 (11)0.0197 (8)−0.0020 (7)0.0035 (6)0.0001 (7)
C190.0187 (8)0.0181 (11)0.0187 (8)−0.0004 (7)0.0027 (6)0.0003 (7)
C200.0225 (8)0.0200 (12)0.0168 (8)0.0019 (7)0.0018 (6)0.0010 (7)
C210.0277 (9)0.0305 (13)0.0190 (8)0.0014 (8)0.0044 (7)0.0027 (8)
C220.0354 (10)0.0360 (14)0.0237 (9)−0.0007 (9)0.0104 (7)0.0009 (9)
C230.0261 (9)0.0264 (14)0.0219 (9)−0.0034 (9)0.0057 (7)−0.0053 (8)
C240.0253 (9)0.0462 (15)0.0200 (8)−0.0015 (9)−0.0007 (7)−0.0009 (9)
C250.0342 (10)0.0465 (15)0.0182 (8)0.0131 (9)0.0052 (7)−0.0009 (9)
C260.0360 (10)0.0268 (13)0.0253 (9)−0.0012 (9)0.0122 (7)−0.0018 (8)
C270.0169 (8)0.0236 (12)0.0190 (8)0.0008 (7)0.0015 (6)0.0038 (7)
O1—C31.2246 (19)C13—C141.540 (3)
O2—C31.318 (2)C13—C171.544 (2)
O2—H1O20.8200C13—H13A0.9800
O3—C231.349 (2)C14—C151.537 (2)
O3—C201.478 (2)C14—C181.549 (2)
O4—C231.201 (3)C15—C161.542 (2)
C1—C21.532 (2)C15—H15A0.9700
C1—C101.552 (2)C15—H15B0.9700
C1—H1A0.9700C16—C171.552 (3)
C1—H1B0.9700C16—H16A0.9700
C2—C31.500 (2)C16—H16B0.9700
C2—H2A0.9700C17—C201.532 (2)
C2—H2B0.9700C17—H17A0.9800
C4—C251.374 (3)C18—H18A0.9600
C4—C261.456 (2)C18—H18B0.9600
C4—C51.526 (2)C18—H18C0.9600
C5—C61.530 (2)C19—H19A0.9600
C5—C101.564 (3)C19—H19B0.9600
C5—H5A0.9800C19—H19C0.9600
C6—C71.534 (2)C20—C241.522 (2)
C6—H6A0.9700C20—C211.535 (2)
C6—H6B0.9700C21—C221.520 (3)
C7—C81.539 (3)C21—H21A0.9700
C7—H7A0.9700C21—H21B0.9700
C7—H7B0.9700C22—C231.513 (3)
C8—C271.544 (2)C22—H22A0.9700
C8—C91.569 (2)C22—H22B0.9700
C8—C141.577 (2)C24—H24A0.9600
C9—C111.538 (2)C24—H24B0.9600
C9—C101.573 (2)C24—H24C0.9600
C9—H9A0.9800C25—H25A0.9300
C10—C191.540 (2)C25—H25B0.9300
C11—C121.538 (2)C26—H26A0.9600
C11—H11A0.9700C26—H26B0.9600
C11—H11B0.9700C26—H26C0.9600
C12—C131.520 (2)C27—H27A0.9600
C12—H12A0.9700C27—H27B0.9600
C12—H12B0.9700C27—H27C0.9600
C3—O2—H1O2109.5C13—C14—C18110.67 (13)
C23—O3—C20110.86 (14)C15—C14—C8117.57 (12)
C2—C1—C10118.06 (15)C13—C14—C8109.68 (14)
C2—C1—H1A107.8C18—C14—C8111.65 (12)
C10—C1—H1A107.8C14—C15—C16102.95 (13)
C2—C1—H1B107.8C14—C15—H15A111.2
C10—C1—H1B107.8C16—C15—H15A111.2
H1A—C1—H1B107.1C14—C15—H15B111.2
C3—C2—C1114.24 (15)C16—C15—H15B111.2
C3—C2—H2A108.7H15A—C15—H15B109.1
C1—C2—H2A108.7C15—C16—C17105.76 (14)
C3—C2—H2B108.7C15—C16—H16A110.6
C1—C2—H2B108.7C17—C16—H16A110.6
H2A—C2—H2B107.6C15—C16—H16B110.6
O1—C3—O2121.97 (16)C17—C16—H16B110.6
O1—C3—C2123.28 (17)H16A—C16—H16B108.7
O2—C3—C2114.73 (14)C20—C17—C13116.35 (15)
C25—C4—C26120.40 (15)C20—C17—C16111.16 (14)
C25—C4—C5118.84 (15)C13—C17—C16104.56 (13)
C26—C4—C5120.56 (15)C20—C17—H17A108.2
C4—C5—C6110.90 (13)C13—C17—H17A108.2
C4—C5—C10115.86 (15)C16—C17—H17A108.2
C6—C5—C10111.62 (12)C14—C18—H18A109.5
C4—C5—H5A105.9C14—C18—H18B109.5
C6—C5—H5A105.9H18A—C18—H18B109.5
C10—C5—H5A105.9C14—C18—H18C109.5
C5—C6—C7111.55 (13)H18A—C18—H18C109.5
C5—C6—H6A109.3H18B—C18—H18C109.5
C7—C6—H6A109.3C10—C19—H19A109.5
C5—C6—H6B109.3C10—C19—H19B109.5
C7—C6—H6B109.3H19A—C19—H19B109.5
H6A—C6—H6B108.0C10—C19—H19C109.5
C6—C7—C8113.22 (15)H19A—C19—H19C109.5
C6—C7—H7A108.9H19B—C19—H19C109.5
C8—C7—H7A108.9O3—C20—C24105.58 (15)
C6—C7—H7B108.9O3—C20—C17108.60 (13)
C8—C7—H7B108.9C24—C20—C17114.09 (14)
H7A—C7—H7B107.7O3—C20—C21103.40 (14)
C7—C8—C27108.07 (13)C24—C20—C21112.04 (13)
C7—C8—C9108.67 (12)C17—C20—C21112.27 (15)
C27—C8—C9112.73 (14)C22—C21—C20102.91 (16)
C7—C8—C14110.24 (14)C22—C21—H21A111.2
C27—C8—C14109.77 (12)C20—C21—H21A111.2
C9—C8—C14107.36 (12)C22—C21—H21B111.2
C11—C9—C8112.00 (12)C20—C21—H21B111.2
C11—C9—C10113.94 (14)H21A—C21—H21B109.1
C8—C9—C10115.97 (12)C23—C22—C21104.06 (14)
C11—C9—H9A104.5C23—C22—H22A110.9
C8—C9—H9A104.5C21—C22—H22A110.9
C10—C9—H9A104.5C23—C22—H22B110.9
C19—C10—C1104.15 (14)C21—C22—H22B110.9
C19—C10—C5112.46 (13)H22A—C22—H22B109.0
C1—C10—C5109.68 (12)O4—C23—O3122.54 (18)
C19—C10—C9113.76 (12)O4—C23—C22127.84 (17)
C1—C10—C9109.96 (12)O3—C23—C22109.62 (17)
C5—C10—C9106.81 (13)C20—C24—H24A109.5
C9—C11—C12112.96 (15)C20—C24—H24B109.5
C9—C11—H11A109.0H24A—C24—H24B109.5
C12—C11—H11A109.0C20—C24—H24C109.5
C9—C11—H11B109.0H24A—C24—H24C109.5
C12—C11—H11B109.0H24B—C24—H24C109.5
H11A—C11—H11B107.8C4—C25—H25A120.0
C13—C12—C11108.90 (13)C4—C25—H25B120.0
C13—C12—H12A109.9H25A—C25—H25B120.0
C11—C12—H12A109.9C4—C26—H26A109.5
C13—C12—H12B109.9C4—C26—H26B109.5
C11—C12—H12B109.9H26A—C26—H26B109.5
H12A—C12—H12B108.3C4—C26—H26C109.5
C12—C13—C14111.86 (12)H26A—C26—H26C109.5
C12—C13—C17119.33 (13)H26B—C26—H26C109.5
C14—C13—C17104.96 (14)C8—C27—H27A109.5
C12—C13—H13A106.7C8—C27—H27B109.5
C14—C13—H13A106.7H27A—C27—H27B109.5
C17—C13—H13A106.7C8—C27—H27C109.5
C15—C14—C13100.31 (12)H27A—C27—H27C109.5
C15—C14—C18106.36 (14)H27B—C27—H27C109.5
C10—C1—C2—C3179.42 (14)C12—C13—C14—C1861.31 (17)
C1—C2—C3—O1−167.70 (14)C17—C13—C14—C18−69.49 (15)
C1—C2—C3—O214.2 (2)C12—C13—C14—C8−62.31 (16)
C25—C4—C5—C6−127.01 (19)C17—C13—C14—C8166.89 (12)
C26—C4—C5—C647.9 (2)C7—C8—C14—C15−69.81 (18)
C25—C4—C5—C10104.4 (2)C27—C8—C14—C1549.1 (2)
C26—C4—C5—C10−80.6 (2)C9—C8—C14—C15171.98 (15)
C4—C5—C6—C7169.65 (14)C7—C8—C14—C13176.54 (12)
C10—C5—C6—C7−59.54 (18)C27—C8—C14—C13−64.53 (17)
C5—C6—C7—C857.01 (18)C9—C8—C14—C1358.33 (15)
C6—C7—C8—C2771.31 (17)C7—C8—C14—C1853.50 (18)
C6—C7—C8—C9−51.32 (17)C27—C8—C14—C18172.43 (15)
C6—C7—C8—C14−168.72 (12)C9—C8—C14—C18−64.71 (17)
C7—C8—C9—C11−174.60 (12)C13—C14—C15—C16−45.09 (16)
C27—C8—C9—C1165.63 (16)C18—C14—C15—C1670.21 (16)
C14—C8—C9—C11−55.38 (17)C8—C14—C15—C16−163.85 (15)
C7—C8—C9—C1052.28 (18)C14—C15—C16—C1731.41 (17)
C27—C8—C9—C10−67.49 (18)C12—C13—C17—C2087.32 (18)
C14—C8—C9—C10171.50 (13)C14—C13—C17—C20−146.36 (14)
C2—C1—C10—C19173.23 (14)C12—C13—C17—C16−149.67 (15)
C2—C1—C10—C5−66.19 (17)C14—C13—C17—C16−23.35 (15)
C2—C1—C10—C950.98 (19)C15—C16—C17—C20121.33 (15)
C4—C5—C10—C1958.99 (18)C15—C16—C17—C13−4.99 (17)
C6—C5—C10—C19−69.22 (17)C23—O3—C20—C2494.59 (15)
C4—C5—C10—C1−56.40 (17)C23—O3—C20—C17−142.66 (14)
C6—C5—C10—C1175.39 (12)C23—O3—C20—C21−23.24 (16)
C4—C5—C10—C9−175.53 (12)C13—C17—C20—O3−61.86 (17)
C6—C5—C10—C956.25 (15)C16—C17—C20—O3178.64 (13)
C11—C9—C10—C19−62.02 (18)C13—C17—C20—C2455.6 (2)
C8—C9—C10—C1970.2 (2)C16—C17—C20—C24−63.92 (19)
C11—C9—C10—C154.34 (17)C13—C17—C20—C21−175.56 (15)
C8—C9—C10—C1−173.43 (13)C16—C17—C20—C2164.93 (18)
C11—C9—C10—C5173.30 (12)O3—C20—C21—C2229.77 (16)
C8—C9—C10—C5−54.48 (16)C24—C20—C21—C22−83.45 (19)
C8—C9—C11—C1255.20 (17)C17—C20—C21—C22146.64 (15)
C10—C9—C11—C12−170.68 (12)C20—C21—C22—C23−26.18 (17)
C9—C11—C12—C13−54.70 (17)C20—O3—C23—O4−174.19 (16)
C11—C12—C13—C1458.51 (17)C20—O3—C23—C226.50 (18)
C11—C12—C13—C17−178.51 (14)C21—C22—C23—O4−166.08 (19)
C12—C13—C14—C15173.32 (12)C21—C22—C23—O313.18 (18)
C17—C13—C14—C1542.51 (14)
D—H···AD—HH···AD···AD—H···A
O2—H1O2···O1i0.821.882.6541 (18)156
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯AD—HH⋯ADAD—H⋯A
O2—H1O2⋯O1i0.821.882.6541 (18)156

Symmetry code: (i) .

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Journal:  Phytochemistry       Date:  2001-05       Impact factor: 4.072

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Authors:  Soyoung Kim; Angela A Salim; Steven M Swanson; A Douglas Kinghorn
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Authors:  Anthony L Spek
Journal:  Acta Crystallogr D Biol Crystallogr       Date:  2009-01-20
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