Literature DB >> 25553022

Crystal structure of betulinic acid methanol monosolvate.

Wei Tang1, Neng-Hua Chen1, Guo-Qiang Li1, Guo-Cai Wang1, Yao-Lan Li1.   

Abstract

The title compound [systematic name: 3β-hy-droxy-lup-20(29)-en-28-oic acid methanol monosolvate], C30H48O3·CH3OH, is a solvent pseudopolymorph of a naturally occurring plant-derived lupane-type penta-cyclic triterpenoid, which was isolated from the traditional Chinese medicinal plant Syzygium jambos (L.) Alston. The dihedral angle between the planes of the carb-oxy-lic acid group and the olefinic group is 12.17 (18)°. The A/B, B/C, C/D and D/E ring junctions are all trans-fused. In the crystal, O-H⋯O hydrogen bonds involving the hy-droxy and carb-oxy-lic acid groups and the methanol solvent mol-ecule give rise to a two-dimensional network structure lying parallel to (001).

Entities:  

Keywords:  Syzygium jambos (L.) Alston; betulinic acid; crystal structure; hydrogen bonding; lup-20(29)-en-28-oic acid; natural product

Year:  2014        PMID: 25553022      PMCID: PMC4257419          DOI: 10.1107/S1600536814023848

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


Related literature

For general background to the synthesis, extraction and pharmceutical activities of the title compound, see: Kashiwada et al. (1996 ▶); Fulda et al. (1999 ▶); Liu et al. (2009 ▶); Safe et al. (2012 ▶); Babalola et al. (2013 ▶); Heidary Navid et al. (2014 ▶); Yadav & Gupta (2014 ▶). For the structure of another methanol solvate of betulinic acid, see: Wang et al. (2014 ▶).

Experimental

Crystal data

C30H48O3·CH4O M = 488.73 Orthorhombic, a = 7.0988 (2) Å b = 12.3864 (3) Å c = 33.2745 (9) Å V = 2925.78 (13) Å3 Z = 4 Cu Kα radiation μ = 0.55 mm−1 T = 293 K 0.28 × 0.25 × 0.20 mm

Data collection

Oxford Diffraction Gemini S Ultra CCD-detector diffractometer Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2011 ▶) T min = 0.748, T max = 1.000 8319 measured reflections 4343 independent reflections 3796 reflections with I > 2σ(I) R int = 0.030

Refinement

R[F 2 > 2σ(F 2)] = 0.044 wR(F 2) = 0.112 S = 1.05 4343 reflections 326 parameters H-atom parameters constrained Δρmax = 0.15 e Å−3 Δρmin = −0.19 e Å−3

Data collection: CrysAlis PRO (Agilent, 2011 ▶); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: OLEX2 (Dolomanov et al., 2009 ▶); software used to prepare material for publication: OLEX2. Crystal structure: contains datablock(s) I, global. DOI: 10.1107/S1600536814023848/zs2317sup1.cif Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536814023848/zs2317Isup2.hkl Click here for additional data file. . DOI: 10.1107/S1600536814023848/zs2317fig1.tif The mol­ecular structure of the title compound showing 50% probability displacement ellipsoids and the atom-numbering scheme. CCDC reference: 1031558 Additional supporting information: crystallographic information; 3D view; checkCIF report
C30H48O3·CH4ODx = 1.110 Mg m3
Mr = 488.73Cu Kα radiation, λ = 1.54184 Å
Orthorhombic, P212121Cell parameters from 3107 reflections
a = 7.0988 (2) Åθ = 3.8–62.4°
b = 12.3864 (3) ŵ = 0.55 mm1
c = 33.2745 (9) ÅT = 293 K
V = 2925.78 (13) Å3Block, colourless
Z = 40.28 × 0.25 × 0.20 mm
F(000) = 1080
Oxford Diffraction Gemini S Ultra CCD-detector diffractometer4343 independent reflections
Radiation source: Enhance Ultra (Cu) X-ray source3796 reflections with I > 2σ(I)
Mirror monochromatorRint = 0.030
Detector resolution: 16.0288 pixels mm-1θmax = 62.8°, θmin = 3.8°
ω scansh = −8→6
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2011)k = −14→14
Tmin = 0.748, Tmax = 1.000l = −38→30
8319 measured reflections
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.044Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.112H-atom parameters constrained
S = 1.05w = 1/[σ2(Fo2) + (0.0489P)2 + 0.2568P] where P = (Fo2 + 2Fc2)/3
4343 reflections(Δ/σ)max < 0.001
326 parametersΔρmax = 0.15 e Å3
0 restraintsΔρmin = −0.19 e Å3
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
C10.8725 (3)0.2245 (2)0.29320 (7)0.0558 (5)
H1A1.00100.23030.28360.067*
H1B0.80280.28590.28280.067*
C20.8736 (4)0.2301 (2)0.33899 (8)0.0599 (6)
H2A0.95530.17410.34950.072*
H2B0.92360.29940.34740.072*
C30.6797 (3)0.21606 (19)0.35581 (7)0.0529 (5)
H30.60160.27510.34550.063*
C40.5845 (3)0.10912 (18)0.34382 (7)0.0473 (5)
C50.5903 (3)0.10297 (16)0.29712 (7)0.0418 (4)
H50.51470.16480.28830.050*
C60.4890 (3)0.00515 (18)0.27942 (7)0.0495 (5)
H6A0.5679−0.05830.28220.059*
H6B0.3730−0.00760.29410.059*
C70.4445 (3)0.02402 (17)0.23522 (7)0.0489 (5)
H7A0.35580.08330.23310.059*
H7B0.3836−0.03990.22450.059*
C80.6183 (3)0.04992 (15)0.20917 (7)0.0427 (4)
C90.7414 (3)0.13761 (16)0.23044 (6)0.0423 (4)
H90.66400.20310.22970.051*
C100.7845 (3)0.11993 (17)0.27634 (7)0.0438 (5)
C110.9151 (3)0.1655 (2)0.20478 (7)0.0563 (6)
H11A0.98450.22340.21770.068*
H11B0.99710.10300.20350.068*
C120.8635 (3)0.2003 (2)0.16204 (7)0.0543 (5)
H12A0.80060.26980.16300.065*
H12B0.97790.20890.14640.065*
C130.7357 (3)0.11911 (17)0.14128 (7)0.0458 (5)
H130.80560.05090.14020.055*
C140.5543 (3)0.09684 (16)0.16666 (7)0.0424 (4)
C150.4247 (3)0.01587 (18)0.14456 (7)0.0519 (5)
H15A0.4808−0.05540.14640.062*
H15B0.30480.01330.15850.062*
C160.3869 (3)0.0408 (2)0.10007 (8)0.0564 (5)
H16A0.3162−0.01800.08810.068*
H16B0.31220.10610.09790.068*
C170.5722 (3)0.05540 (19)0.07771 (7)0.0523 (5)
C180.6821 (3)0.14719 (17)0.09793 (7)0.0479 (5)
H180.59340.20760.09990.057*
C190.8349 (3)0.1842 (2)0.06760 (7)0.0553 (5)
H190.95050.14290.07240.066*
C200.8807 (4)0.3028 (2)0.06820 (8)0.0686 (7)
C210.7510 (4)0.1508 (2)0.02599 (8)0.0705 (7)
H21A0.73580.21370.00900.085*
H21B0.83430.10020.01260.085*
C220.5582 (4)0.0977 (2)0.03415 (8)0.0651 (6)
H22A0.53540.03890.01550.078*
H22B0.45730.15010.03160.078*
C230.3767 (3)0.1168 (2)0.35735 (8)0.0648 (6)
H23A0.31430.17240.34230.097*
H23B0.37160.13380.38550.097*
H23C0.31520.04900.35270.097*
C240.6753 (4)0.0131 (2)0.36544 (8)0.0646 (6)
H24A0.6265−0.05300.35460.097*
H24B0.64700.01680.39360.097*
H24C0.80940.01540.36170.097*
C250.9274 (3)0.0275 (2)0.28368 (8)0.0589 (6)
H25A0.98620.03720.30940.088*
H25B1.02170.02860.26300.088*
H25C0.8628−0.04050.28320.088*
C260.7285 (4)−0.05744 (18)0.20362 (8)0.0577 (6)
H26A0.6720−0.09870.18240.087*
H26B0.7244−0.09820.22820.087*
H26C0.8571−0.04180.19690.087*
C270.4397 (3)0.20241 (17)0.17149 (7)0.0496 (5)
H27A0.34190.19170.19100.074*
H27B0.38450.22170.14610.074*
H27C0.52170.25930.18030.074*
C280.6745 (4)−0.0533 (2)0.07527 (7)0.0577 (6)
C291.0572 (6)0.3352 (3)0.07162 (10)0.0984 (12)
H29A1.08590.40830.07030.118*
H29B1.15270.28480.07540.118*
C300.7208 (7)0.3804 (3)0.06214 (16)0.1213 (16)
H30A0.65490.36250.03780.182*
H30B0.76930.45260.06020.182*
H30C0.63580.37580.08450.182*
C310.9582 (9)−0.3072 (4)0.0316 (2)0.154 (2)
H31A0.8962−0.27690.00860.232*
H31B0.8714−0.35210.04610.232*
H31C1.0637−0.34980.02300.232*
O10.6889 (3)0.22739 (17)0.39892 (5)0.0708 (5)
H10.59330.25760.40700.106*
O20.5943 (3)−0.13820 (15)0.07479 (8)0.0919 (7)
O30.8560 (3)−0.04848 (17)0.07166 (10)0.0961 (8)
H3A0.8982−0.10950.06830.144*
O41.0176 (5)−0.2288 (2)0.05516 (11)0.1310 (12)
H41.1022−0.25140.06970.197*
U11U22U33U12U13U23
C10.0482 (11)0.0607 (13)0.0586 (12)−0.0167 (11)0.0012 (11)−0.0014 (11)
C20.0538 (12)0.0635 (14)0.0624 (13)−0.0131 (11)−0.0032 (12)−0.0061 (12)
C30.0494 (11)0.0542 (12)0.0551 (12)0.0044 (10)−0.0024 (10)−0.0023 (10)
C40.0382 (10)0.0501 (11)0.0536 (11)0.0031 (9)0.0006 (10)0.0055 (10)
C50.0333 (9)0.0362 (9)0.0558 (11)0.0030 (8)−0.0002 (9)0.0064 (9)
C60.0418 (10)0.0434 (10)0.0633 (13)−0.0080 (9)0.0052 (10)0.0061 (10)
C70.0391 (9)0.0451 (11)0.0624 (12)−0.0124 (9)0.0012 (10)0.0008 (10)
C80.0339 (9)0.0364 (9)0.0577 (12)0.0011 (8)0.0019 (9)−0.0014 (9)
C90.0308 (9)0.0417 (10)0.0544 (11)−0.0009 (8)−0.0008 (9)0.0001 (9)
C100.0313 (9)0.0450 (10)0.0552 (11)0.0001 (9)0.0003 (9)0.0018 (9)
C110.0365 (10)0.0771 (15)0.0554 (12)−0.0146 (11)0.0012 (10)0.0001 (12)
C120.0413 (10)0.0671 (14)0.0545 (12)−0.0157 (10)0.0043 (10)0.0011 (11)
C130.0360 (9)0.0471 (10)0.0543 (11)0.0006 (9)0.0025 (9)−0.0007 (10)
C140.0334 (8)0.0382 (9)0.0554 (11)−0.0008 (8)0.0023 (9)0.0001 (9)
C150.0421 (10)0.0515 (11)0.0621 (13)−0.0098 (9)−0.0009 (10)−0.0032 (11)
C160.0453 (11)0.0591 (12)0.0649 (13)−0.0047 (10)−0.0115 (11)−0.0046 (11)
C170.0506 (11)0.0522 (11)0.0540 (12)−0.0008 (10)−0.0075 (10)0.0000 (10)
C180.0441 (10)0.0452 (11)0.0543 (12)−0.0007 (9)0.0005 (10)0.0002 (10)
C190.0563 (12)0.0568 (12)0.0528 (12)−0.0060 (11)0.0053 (11)−0.0016 (11)
C200.0894 (19)0.0612 (14)0.0554 (13)−0.0172 (15)0.0160 (14)−0.0033 (12)
C210.0819 (17)0.0765 (16)0.0532 (13)−0.0124 (15)0.0004 (14)0.0000 (13)
C220.0743 (15)0.0646 (14)0.0564 (13)−0.0050 (13)−0.0122 (13)0.0033 (12)
C230.0435 (11)0.0870 (17)0.0638 (14)0.0008 (12)0.0080 (11)0.0005 (14)
C240.0694 (15)0.0607 (14)0.0638 (14)0.0060 (12)−0.0038 (13)0.0145 (12)
C250.0409 (10)0.0737 (15)0.0621 (13)0.0179 (11)−0.0013 (11)0.0006 (12)
C260.0615 (13)0.0457 (11)0.0659 (13)0.0131 (11)−0.0074 (12)−0.0047 (11)
C270.0421 (10)0.0464 (11)0.0602 (12)0.0072 (9)0.0012 (10)0.0027 (10)
C280.0654 (14)0.0521 (13)0.0555 (12)−0.0026 (12)0.0008 (11)−0.0065 (11)
C290.127 (3)0.100 (2)0.0679 (17)−0.058 (2)−0.011 (2)0.0139 (17)
C300.139 (3)0.0624 (17)0.162 (4)0.013 (2)0.058 (3)0.019 (2)
C310.161 (5)0.122 (4)0.180 (5)0.010 (4)−0.045 (5)−0.058 (4)
O10.0632 (10)0.0922 (13)0.0571 (9)0.0064 (10)0.0017 (8)−0.0142 (9)
O20.1020 (15)0.0548 (10)0.1188 (17)−0.0123 (11)0.0369 (15)−0.0120 (11)
O30.0664 (11)0.0634 (10)0.159 (2)0.0099 (9)−0.0085 (14)−0.0236 (14)
O40.135 (2)0.1133 (19)0.144 (2)0.0652 (18)−0.068 (2)−0.0608 (19)
C1—C21.525 (3)C16—H16B0.9700
C1—C101.544 (3)C17—C281.532 (3)
C1—H1A0.9700C17—C181.534 (3)
C1—H1B0.9700C17—C221.544 (4)
C2—C31.496 (3)C18—C191.551 (3)
C2—H2A0.9700C18—H180.9800
C2—H2B0.9700C19—C201.505 (4)
C3—O11.443 (3)C19—C211.563 (4)
C3—C41.540 (3)C19—H190.9800
C3—H30.9800C20—C291.320 (5)
C4—C241.532 (3)C20—C301.501 (5)
C4—C231.545 (3)C21—C221.542 (4)
C4—C51.556 (3)C21—H21A0.9700
C5—C61.527 (3)C21—H21B0.9700
C5—C101.557 (3)C22—H22A0.9700
C5—H50.9800C22—H22B0.9700
C6—C71.522 (3)C23—H23A0.9600
C6—H6A0.9700C23—H23B0.9600
C6—H6B0.9700C23—H23C0.9600
C7—C81.542 (3)C24—H24A0.9600
C7—H7A0.9700C24—H24B0.9600
C7—H7B0.9700C24—H24C0.9600
C8—C261.554 (3)C25—H25A0.9600
C8—C91.563 (3)C25—H25B0.9600
C8—C141.595 (3)C25—H25C0.9600
C9—C111.539 (3)C26—H26A0.9600
C9—C101.573 (3)C26—H26B0.9600
C9—H90.9800C26—H26C0.9600
C10—C251.549 (3)C27—H27A0.9600
C11—C121.531 (3)C27—H27B0.9600
C11—H11A0.9700C27—H27C0.9600
C11—H11B0.9700C28—O21.196 (3)
C12—C131.521 (3)C28—O31.295 (3)
C12—H12A0.9700C29—H29A0.9300
C12—H12B0.9700C29—H29B0.9300
C13—C181.532 (3)C30—H30A0.9600
C13—C141.564 (3)C30—H30B0.9600
C13—H130.9800C30—H30C0.9600
C14—C151.547 (3)C31—O41.317 (6)
C14—C271.548 (3)C31—H31A0.9600
C15—C161.536 (4)C31—H31B0.9600
C15—H15A0.9700C31—H31C0.9600
C15—H15B0.9700O1—H10.8200
C16—C171.522 (3)O3—H3A0.8200
C16—H16A0.9700O4—H40.8200
C2—C1—C10113.8 (2)C17—C16—C15110.12 (18)
C2—C1—H1A108.8C17—C16—H16A109.6
C10—C1—H1A108.8C15—C16—H16A109.6
C2—C1—H1B108.8C17—C16—H16B109.6
C10—C1—H1B108.8C15—C16—H16B109.6
H1A—C1—H1B107.7H16A—C16—H16B108.2
C3—C2—C1111.3 (2)C16—C17—C28109.31 (19)
C3—C2—H2A109.4C16—C17—C18108.26 (19)
C1—C2—H2A109.4C28—C17—C18115.70 (19)
C3—C2—H2B109.4C16—C17—C22116.3 (2)
C1—C2—H2B109.4C28—C17—C22106.2 (2)
H2A—C2—H2B108.0C18—C17—C22101.12 (19)
O1—C3—C2108.62 (19)C13—C18—C17111.77 (18)
O1—C3—C4111.2 (2)C13—C18—C19120.43 (18)
C2—C3—C4114.0 (2)C17—C18—C19106.80 (18)
O1—C3—H3107.6C13—C18—H18105.6
C2—C3—H3107.6C17—C18—H18105.6
C4—C3—H3107.6C19—C18—H18105.6
C24—C4—C3111.19 (19)C20—C19—C18115.5 (2)
C24—C4—C23108.2 (2)C20—C19—C21110.7 (2)
C3—C4—C23106.88 (19)C18—C19—C21103.41 (19)
C24—C4—C5114.82 (19)C20—C19—H19109.0
C3—C4—C5106.82 (18)C18—C19—H19109.0
C23—C4—C5108.60 (18)C21—C19—H19109.0
C6—C5—C4114.31 (18)C29—C20—C30122.4 (3)
C6—C5—C10110.66 (17)C29—C20—C19120.2 (3)
C4—C5—C10117.39 (17)C30—C20—C19117.4 (3)
C6—C5—H5104.3C22—C21—C19107.2 (2)
C4—C5—H5104.3C22—C21—H21A110.3
C10—C5—H5104.3C19—C21—H21A110.3
C7—C6—C5110.40 (18)C22—C21—H21B110.3
C7—C6—H6A109.6C19—C21—H21B110.3
C5—C6—H6A109.6H21A—C21—H21B108.5
C7—C6—H6B109.6C21—C22—C17104.6 (2)
C5—C6—H6B109.6C21—C22—H22A110.8
H6A—C6—H6B108.1C17—C22—H22A110.8
C6—C7—C8114.14 (18)C21—C22—H22B110.8
C6—C7—H7A108.7C17—C22—H22B110.8
C8—C7—H7A108.7H22A—C22—H22B108.9
C6—C7—H7B108.7C4—C23—H23A109.5
C8—C7—H7B108.7C4—C23—H23B109.5
H7A—C7—H7B107.6H23A—C23—H23B109.5
C7—C8—C26106.96 (18)C4—C23—H23C109.5
C7—C8—C9109.73 (17)H23A—C23—H23C109.5
C26—C8—C9111.53 (16)H23B—C23—H23C109.5
C7—C8—C14110.27 (16)C4—C24—H24A109.5
C26—C8—C14110.46 (18)C4—C24—H24B109.5
C9—C8—C14107.91 (15)H24A—C24—H24B109.5
C11—C9—C8110.68 (18)C4—C24—H24C109.5
C11—C9—C10114.46 (16)H24A—C24—H24C109.5
C8—C9—C10116.83 (17)H24B—C24—H24C109.5
C11—C9—H9104.4C10—C25—H25A109.5
C8—C9—H9104.4C10—C25—H25B109.5
C10—C9—H9104.4H25A—C25—H25B109.5
C1—C10—C25107.34 (18)C10—C25—H25C109.5
C1—C10—C5108.07 (18)H25A—C25—H25C109.5
C25—C10—C5114.23 (18)H25B—C25—H25C109.5
C1—C10—C9108.34 (17)C8—C26—H26A109.5
C25—C10—C9112.54 (18)C8—C26—H26B109.5
C5—C10—C9106.13 (16)H26A—C26—H26B109.5
C12—C11—C9112.75 (18)C8—C26—H26C109.5
C12—C11—H11A109.0H26A—C26—H26C109.5
C9—C11—H11A109.0H26B—C26—H26C109.5
C12—C11—H11B109.0C14—C27—H27A109.5
C9—C11—H11B109.0C14—C27—H27B109.5
H11A—C11—H11B107.8H27A—C27—H27B109.5
C13—C12—C11112.25 (19)C14—C27—H27C109.5
C13—C12—H12A109.2H27A—C27—H27C109.5
C11—C12—H12A109.2H27B—C27—H27C109.5
C13—C12—H12B109.2O2—C28—O3120.8 (3)
C11—C12—H12B109.2O2—C28—C17123.2 (2)
H12A—C12—H12B107.9O3—C28—C17115.8 (2)
C12—C13—C18115.19 (18)C20—C29—H29A120.0
C12—C13—C14111.25 (18)C20—C29—H29B120.0
C18—C13—C14110.13 (17)H29A—C29—H29B120.0
C12—C13—H13106.6C20—C30—H30A109.5
C18—C13—H13106.6C20—C30—H30B109.5
C14—C13—H13106.6H30A—C30—H30B109.5
C15—C14—C27106.52 (17)C20—C30—H30C109.5
C15—C14—C13110.32 (17)H30A—C30—H30C109.5
C27—C14—C13109.85 (16)H30B—C30—H30C109.5
C15—C14—C8110.77 (16)O4—C31—H31A109.5
C27—C14—C8111.42 (17)O4—C31—H31B109.5
C13—C14—C8107.97 (15)H31A—C31—H31B109.5
C16—C15—C14115.59 (19)O4—C31—H31C109.5
C16—C15—H15A108.4H31A—C31—H31C109.5
C14—C15—H15A108.4H31B—C31—H31C109.5
C16—C15—H15B108.4C3—O1—H1109.5
C14—C15—H15B108.4C28—O3—H3A109.5
H15A—C15—H15B107.4C31—O4—H4109.5
C10—C1—C2—C3−55.7 (3)C18—C13—C14—C27−67.3 (2)
C1—C2—C3—O1−177.2 (2)C12—C13—C14—C8−60.0 (2)
C1—C2—C3—C458.2 (3)C18—C13—C14—C8171.05 (17)
O1—C3—C4—C24−51.5 (2)C7—C8—C14—C15−57.9 (2)
C2—C3—C4—C2471.7 (3)C26—C8—C14—C1560.2 (2)
O1—C3—C4—C2366.4 (2)C9—C8—C14—C15−177.70 (16)
C2—C3—C4—C23−170.4 (2)C7—C8—C14—C2760.5 (2)
O1—C3—C4—C5−177.52 (17)C26—C8—C14—C27178.54 (17)
C2—C3—C4—C5−54.3 (2)C9—C8—C14—C27−59.3 (2)
C24—C4—C5—C660.3 (2)C7—C8—C14—C13−178.75 (16)
C3—C4—C5—C6−175.89 (17)C26—C8—C14—C13−60.7 (2)
C23—C4—C5—C6−60.9 (2)C9—C8—C14—C1361.41 (19)
C24—C4—C5—C10−71.7 (2)C27—C14—C15—C1670.8 (2)
C3—C4—C5—C1052.0 (2)C13—C14—C15—C16−48.4 (2)
C23—C4—C5—C10166.98 (19)C8—C14—C15—C16−167.85 (18)
C4—C5—C6—C7161.11 (17)C14—C15—C16—C1753.2 (3)
C10—C5—C6—C7−63.7 (2)C15—C16—C17—C2868.7 (2)
C5—C6—C7—C856.8 (2)C15—C16—C17—C18−58.1 (2)
C6—C7—C8—C2674.0 (2)C15—C16—C17—C22−171.1 (2)
C6—C7—C8—C9−47.1 (2)C12—C13—C18—C17173.50 (19)
C6—C7—C8—C14−165.83 (17)C14—C13—C18—C17−59.7 (2)
C7—C8—C9—C11−179.51 (18)C12—C13—C18—C1947.0 (3)
C26—C8—C9—C1162.2 (2)C14—C13—C18—C19173.75 (18)
C14—C8—C9—C11−59.3 (2)C16—C17—C18—C1363.8 (2)
C7—C8—C9—C1047.1 (2)C28—C17—C18—C13−59.2 (3)
C26—C8—C9—C10−71.2 (2)C22—C17—C18—C13−173.45 (19)
C14—C8—C9—C10167.28 (16)C16—C17—C18—C19−162.52 (18)
C2—C1—C10—C25−73.5 (3)C28—C17—C18—C1974.4 (2)
C2—C1—C10—C550.1 (3)C22—C17—C18—C19−39.8 (2)
C2—C1—C10—C9164.69 (19)C13—C18—C19—C20−85.4 (3)
C6—C5—C10—C1175.72 (18)C17—C18—C19—C20145.8 (2)
C4—C5—C10—C1−50.6 (2)C13—C18—C19—C21153.6 (2)
C6—C5—C10—C25−64.9 (2)C17—C18—C19—C2124.8 (2)
C4—C5—C10—C2568.8 (2)C18—C19—C20—C29128.0 (3)
C6—C5—C10—C959.7 (2)C21—C19—C20—C29−114.9 (3)
C4—C5—C10—C9−166.61 (17)C18—C19—C20—C30−55.8 (4)
C11—C9—C10—C159.3 (2)C21—C19—C20—C3061.3 (4)
C8—C9—C10—C1−169.06 (17)C20—C19—C21—C22−124.1 (2)
C11—C9—C10—C25−59.3 (2)C18—C19—C21—C220.2 (3)
C8—C9—C10—C2572.4 (2)C19—C21—C22—C17−24.6 (3)
C11—C9—C10—C5175.12 (18)C16—C17—C22—C21155.9 (2)
C8—C9—C10—C5−53.2 (2)C28—C17—C22—C21−82.2 (2)
C8—C9—C11—C1255.0 (3)C18—C17—C22—C2138.9 (3)
C10—C9—C11—C12−170.47 (19)C16—C17—C28—O228.9 (3)
C9—C11—C12—C13−52.4 (3)C18—C17—C28—O2151.4 (3)
C11—C12—C13—C18−178.50 (19)C22—C17—C28—O2−97.3 (3)
C11—C12—C13—C1455.3 (3)C16—C17—C28—O3−154.5 (3)
C12—C13—C14—C15178.84 (18)C18—C17—C28—O3−32.0 (4)
C18—C13—C14—C1549.9 (2)C22—C17—C28—O379.3 (3)
C12—C13—C14—C2761.7 (2)
D—H···AD—HH···AD···AD—H···A
O3—H3A···O40.821.762.571 (3)170
O1—H1···O2i0.821.952.753 (3)165
O4—H4···O1ii0.821.832.640 (3)168
Table 1

Hydrogen-bond geometry (, )

DHA DHHA D A DHA
O3H3AO40.821.762.571(3)170
O1H1O2i 0.821.952.753(3)165
O4H4O1ii 0.821.832.640(3)168

Symmetry codes: (i) ; (ii) .

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3.  Betulinic acid: a new cytotoxic agent against malignant brain-tumor cells.

Authors:  S Fulda; I Jeremias; H H Steiner; T Pietsch; K M Debatin
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Review 5.  Unifying mechanisms of action of the anticancer activities of triterpenoids and synthetic analogs.

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