organic compounds\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
Volume 67| Part 6| June 2011| Pages o1392-o1393

Hopeahainol C monohydrate

aX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, bDepartment of Chemistry, Faculty of Science, Kasetsart University, Jatujak, Bangkok 10900, Thailand, cInstitute of Functional Biomolecules, State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, People's Republic of China, and dCrystal Materials Research Unit, Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
*Correspondence e-mail: hkfun@usm.my

(Received 28 April 2011; accepted 5 May 2011; online 14 May 2011)

In the structure of the title compound, C28H16O6·H2O [systematic name 3,11-bis(4-hydroxyphenyl)-4,12-dioxapentacyclo[8.6.1.12,5.013,17.09,18]octadeca-1(16),2,5(18),6,8,10,13(17),14-octaene-7,15-diol monohydrate], the hopeahainol C mol­ecule lies about an inversion center with the solvent water mol­ecule located on a crystallographic twofold axis. Hopeahainol C is an oligostillbenoid compound and was isolated from the bark of Shorea roxburghii G. Don. The five central fused rings are essentially planar with an r.m.s. deviation of 0.0173 (3) Å. The 4-hy­droxy­phenyl ring is twisted with respect to this plane, with the dihedral angle between the phenyl ring and the fused-ring system being 41.70 (10)°. The crystal features inter­molecular O—H⋯O hydrogen bonds. These inter­actions link the hopeahainol C mol­ecules into chains along the b axis. Water mol­ecules are located inter­stitially between the hopeahainol C mol­ecules linked by O(water)—H⋯O(hy­droxy) and O(hy­droxy)—H⋯O(water) hydrogen bonds. ππ inter­actions are also observed with centroid–centroid distances of 3.6056 (17) and 3.5622 (17) Å. Short O⋯O contacts [2.703 (2)–2.720 (3) Å] are also present in the crystal.

Related literature

For bond-length data, see: Allen et al. (1987[Allen, F. H., Kennard, O., Watson, D. G., Brammer, L., Orpen, A. G. & Taylor, R. (1987). J. Chem. Soc. Perkin Trans. 2, pp. S1-19.]). For background to oligostillbenoids and their activities, see: Cai et al. (2003[Cai, Y. J., Fang, J. G., Ma, L. P., Yang, L. & Liu, Z. L. (2003). Biochim. Biophys. Acta, 1637, 31-38.]); Donnelly et al. (2004[Donnelly, L. E., Newton, R., Kennedy, G. E., Fenwick, P. S., Leung, R. H., Ito, K., Russell, R. E. & Barnes, P. J. (2004). Am. J. Physiol. Lung Cell Mol. Physiol. 287, L774-L783.]); Ge et al. (2009[Ge, H. M., Yang, W. H., Zang, J. & Tan, R. X. (2009). J. Agric. Food. Chem. 57, 5756-5761.]); Jang & Pezzuto (1999[Jang, M. & Pezzuto, J. M. (1999). Drugs Exp. Clin. Res. 25, 65-77.]); Stivala et al. (2001[Stivala, L. A., Savio, M., Carafoli, F., Perucca, P., Bianchi, L., Maga, G., Forti, L., Pagnoni, U. M., Albini, A., Prosperi, E. & Vannini, V. (2001). J. Biol. Chem. 276, 22586-22594.]). For details of Dipterocarpaceae plants, see: Gorham (1995[Gorham, J. (1995). The Biochemistry of the Stilbenoids. London: Chapman & Hall.]); Hakim (2002[Hakim, E. H. (2002). Bull. Ind. Soc. Nat. Prod. Chem. (Indonesia), 2, 1.]); Sotheeswaran & Pasuphaty (1993[Sotheeswaran, S. & Pasuphaty, V. (1993). Phytochemistry, 32, 1083-1092.]); Symington (1974[Symington, C. F. (1974). Foresters Manual of Dipterocarps. Penebit University Malaya, Kuala Lumpur, Malaysia.]). For the stability of the temperature controller used in the data collection, see Cosier & Glazer, (1986[Cosier, J. & Glazer, A. M. (1986). J. Appl. Cryst. 19, 105-107.]).

[Scheme 1]

Experimental

Crystal data
  • C28H16O6·H2O

  • Mr = 466.42

  • Monoclinic, C 2/c

  • a = 21.225 (4) Å

  • b = 3.8500 (7) Å

  • c = 25.353 (5) Å

  • β = 108.933 (4)°

  • V = 1959.7 (6) Å3

  • Z = 4

  • Mo Kα radiation

  • μ = 0.11 mm−1

  • T = 100 K

  • 0.25 × 0.15 × 0.05 mm

Data collection
  • Bruker APEX DUO CCD area-detector diffractometer

  • Absorption correction: multi-scan (SADABS; Bruker, 2009[Bruker (2009). APEX2, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.]) Tmin = 0.972, Tmax = 0.994

  • 7974 measured reflections

  • 2171 independent reflections

  • 1463 reflections with I > 2σ(I)

  • Rint = 0.082

Refinement
  • R[F2 > 2σ(F2)] = 0.068

  • wR(F2) = 0.161

  • S = 1.07

  • 2171 reflections

  • 163 parameters

  • H atoms treated by a mixture of independent and constrained refinement

  • Δρmax = 0.27 e Å−3

  • Δρmin = −0.35 e Å−3

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A D—H H⋯A DA D—H⋯A
O1W—H1W1⋯O2i 0.92 (3) 1.83 (3) 2.720 (2) 163 (3)
O3—H3A⋯O1Wii 0.82 1.89 2.703 (2) 169
O2—H2A⋯O3iii 0.82 2.00 2.716 (3) 145
Symmetry codes: (i) [x, -y+1, z+{\script{1\over 2}}]; (ii) x, y+1, z; (iii) [x, -y+1, z-{\script{1\over 2}}].

Data collection: APEX2 (Bruker, 2009[Bruker (2009). APEX2, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.]); cell refinement: SAINT (Bruker, 2009[Bruker (2009). APEX2, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.]); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009[Spek, A. L. (2009). Acta Cryst. D65, 148-155.]).

Supporting information


Comment top

The genus Shorea is the largest genus of the family Dipterocarpaceae and is mostly distributed in Southeast Asia (Symington, 1974). The Dipterocarpaceous plant has already proved to be a rich source of oligostilbene compounds that are derived from stilbene and resveratrol (3,5,4'-trihydroxystilbene) (Gorham, 1995; Hakim, 2002; Sotheeswaran & Pasuphaty, 1993). It also has been known that resveratrol possesses various biological activities including antioxidant (Cai et al., 2003), anti-cancer, chemo-preventive (Jang & Pezzuto, 1999; Stivala et al., 2001) and anti-inflammatory properties (Donnelly et al., 2004). During the course of our research on searching for novel bioactive compounds from Thai dipeterocarpaceous plants, the title compound (I), known as hopeahainol C, was obtained from Shorea roxburghii G. Don. Hopeahainol C is an oligostilbenoid, which is a highly unsaturated resveratrol dimer, and it possesses potent antioxidant activity (Ge et al., 2009). Herein we report its crystal structure.

The molecule of the title oligostilbenoid (I) (Fig. 1), C28H16O6.H2O, is a symmetrical dimer. Its asymmetric unit contains one half-molecule. The complete molecule of hopeahainol C is generated by a crystallographic center of symmetry 1/2-x, 3/2-y, -z whereas the other hydrogen atom of the water molecule is generated by a two-fold rotation axis -x, y, 1/2-z. The five central fused rings are essentially planar with the r.m.s. 0.0173 (3) Å for the eighteen non-hydrogen atoms. The 4-hydroxyphenyl ring is twisted which respect to the five central fused rings with the dihedral angle between the phenyl and the five central fused rings being 41.65 (10)°. The dihedral angle between the phenyl and the attached dihydrofuran (O1/C7–C9/C14) rings is 40.50 (15)°. The two hydroxy groups of the half molecule are co-planar with the attached benzene ring with the torsion angles O3–C4–C5–C6 = -178.1 (2)° and C10–C11–C12–O2 = -179.5 (2)°. The bond distances are of normal values (Allen et al., 1987).

In the crystal packing (Fig. 2), the molecules of hopeahainol C are linked into chains along the b axis by O(hydroxy)—H···O(hydroxy) hydrogen bonds which form between the two hydroxy groups (Table 1). The water molecules are located in the interstitials of hopeahainol C molecules and are linked to the molecules of hopehainol C by two types of hydrogen bond i.e. O(water)—H···O(hydroxy) and O(hydroxy)—H···O(water) hydrogens bond (Table 1). The crystal is consolidated by these O—H···O hydrogen bonds. ππ interaction with Cg1···Cg3 distance = 3.6055 (17) Å (symmetry code: x, 1+y, z) and Cg2···Cg3 distance = 3.5622 (17) Å (symmetry code: 1/2-x, 5/2-y, -z) were observed where Cg1, Cg2 and Cg3 are the centroids of the O1/C7–C9/C14, C8–C10/C8A–C10A and C9–C14 rings, respectively. In addition O···O short contacts [2.703 (2)-2.720 (3) Å] are also presented in the crystal.

Related literature top

For bond-length data, see: Allen et al. (1987). For background to oligostillbenoids and their activities, see: Cai et al. (2003); Donnelly et al. (2004); Ge et al. (2009); Jang & Pezzuto (1999); Stivala et al. (2001). For details of Dipterocarpaceae plants, see: Gorham (1995); Hakim (2002); Sotheeswaran & Pasuphaty (1993); Symington (1974). For the stability of the temperature controller used in the data collection, see Cosier & Glazer, (1986).

Experimental top

The dried powdered bark of Shorea roxburghii G. Don. (1 kg) which was collected during June-August 2010 from Sam Sung District, Khon Kaen province in the northeastern part of Thailand, was macerated in C2H5OH (2.5 L) for 7 days. The slurry was filtered and the ethanolic extract obtained was dried with a rotary evaporator under reduced pressure at 313 K. The dried extract (98 g) was ground, dissolved in CH3OH, mixed with silica gel (118 g), and then dried in hot air oven at 333 K for one day. The sample was separated by using a wet column chromatographic technique. The column was packed with 1 kg of silica gel (200-300 mesh) and was eluted with gradient mixtures of CHCl3 and CH3OH (100:0 to 0:100), to give 8 major fractions (A–H). Fraction G was further isolated using sephadex column chromatography, eluted with 100% CH3OH. Only the blue methanolic extract could be selectively collected and was pre-concentrated and heated for 5-10 minutes at 313-333 K before being left for 2-3 days at 298 K to allow crystallization of hopeahainol C. Colorless needle-shaped single crystals of the hopeahainol C suitable for X-ray structure determination were obtained from CH3OH by slow evaporation at room temperature after a few days.

Refinement top

The water H atom was located in a difference map and refined isotropically. The remaining H atoms were placed in calculated positions with d(O—H) = 0.82 Å and d(C—H) = 0.93 Å for aromatic. The Uiso values were constrained to be 1.5Ueq of the carrier atom for hydroxy and 1.2Ueq for the remaining H atoms. The highest residual electron density peak is located at 0.66 Å from C9 and the deepest hole is located at 0.90 Å from C4.

Computing details top

Data collection: APEX2 (Bruker, 2009); cell refinement: SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).

Figures top
[Figure 1] Fig. 1. The molecular structure of the title compound, with 60% probability displacement ellipsoids and the atom-numbering scheme. Atoms with suffix A were generated by the symmetry code 1/2-x, 3/2-y, -z.
[Figure 2] Fig. 2. The crystal packing of the title compound viewed down the a axis, showing chains running along the b axis. Hydrogen bonds are shown as dashed lines.
3,11-bis(4-hydroxyphenyl)-4,12- dioxapentacyclo[8.6.1.12,5.013,17.09,18]octadeca- 1(16),2,5(18),6,8,10,13 (17),14-octaene-7,15-diol monohydrate top
Crystal data top
C28H16O6·H2OF(000) = 968
Mr = 466.42Dx = 1.581 Mg m3
Monoclinic, C2/cMo Kα radiation, λ = 0.71073 Å
Hall symbol: -C 2ycCell parameters from 2171 reflections
a = 21.225 (4) Åθ = 2.0–24.8°
b = 3.8500 (7) ŵ = 0.11 mm1
c = 25.353 (5) ÅT = 100 K
β = 108.933 (4)°Needle, colorless
V = 1959.7 (6) Å30.25 × 0.15 × 0.05 mm
Z = 4
Data collection top
Bruker APEX DUO CCD area-detector
diffractometer
2171 independent reflections
Radiation source: sealed tube1463 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.082
ϕ and ω scansθmax = 27.5°, θmin = 2.0°
Absorption correction: multi-scan
(SADABS; Bruker, 2009)
h = 2727
Tmin = 0.972, Tmax = 0.994k = 44
7974 measured reflectionsl = 3232
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.068Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.161H atoms treated by a mixture of independent and constrained refinement
S = 1.07 w = 1/[σ2(Fo2) + (0.0792P)2 + 1.9771P]
where P = (Fo2 + 2Fc2)/3
2171 reflections(Δ/σ)max = 0.001
163 parametersΔρmax = 0.27 e Å3
0 restraintsΔρmin = 0.35 e Å3
Crystal data top
C28H16O6·H2OV = 1959.7 (6) Å3
Mr = 466.42Z = 4
Monoclinic, C2/cMo Kα radiation
a = 21.225 (4) ŵ = 0.11 mm1
b = 3.8500 (7) ÅT = 100 K
c = 25.353 (5) Å0.25 × 0.15 × 0.05 mm
β = 108.933 (4)°
Data collection top
Bruker APEX DUO CCD area-detector
diffractometer
2171 independent reflections
Absorption correction: multi-scan
(SADABS; Bruker, 2009)
1463 reflections with I > 2σ(I)
Tmin = 0.972, Tmax = 0.994Rint = 0.082
7974 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0680 restraints
wR(F2) = 0.161H atoms treated by a mixture of independent and constrained refinement
S = 1.07Δρmax = 0.27 e Å3
2171 reflectionsΔρmin = 0.35 e Å3
163 parameters
Special details top

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
O1W0.00000.5114 (9)0.25000.0199 (7)
H1W10.0200 (15)0.649 (9)0.2803 (13)0.036 (10)*
O10.10067 (8)0.6569 (5)0.01488 (7)0.0151 (5)
O20.08243 (8)0.1345 (5)0.16160 (7)0.0170 (5)
H2A0.10760.06870.17820.026*
O30.11424 (8)1.1827 (5)0.25471 (7)0.0193 (5)
H3A0.07821.27990.24870.029*
C10.14502 (11)0.9053 (7)0.10634 (10)0.0136 (6)
C20.08471 (11)1.0602 (8)0.10499 (10)0.0156 (6)
H2B0.05211.10310.07090.019*
C30.07334 (12)1.1499 (7)0.15414 (10)0.0155 (6)
H3B0.03311.25040.15300.019*
C40.12224 (12)1.0890 (8)0.20487 (10)0.0156 (6)
C50.18124 (12)0.9313 (8)0.20726 (10)0.0165 (6)
H5A0.21330.88550.24150.020*
C60.19264 (12)0.8408 (8)0.15796 (10)0.0152 (6)
H6A0.23270.73570.15950.018*
C70.15626 (11)0.8033 (7)0.05476 (10)0.0136 (6)
C80.20988 (11)0.8046 (8)0.03621 (10)0.0130 (6)
C90.18721 (11)0.6449 (7)0.01786 (10)0.0124 (6)
C100.22099 (11)0.5734 (7)0.05605 (10)0.0119 (6)
C110.18493 (12)0.4004 (7)0.10467 (10)0.0150 (6)
H11A0.20510.34590.13120.018*
C120.11835 (12)0.3081 (7)0.11382 (10)0.0137 (6)
C130.08421 (11)0.3852 (7)0.07681 (10)0.0140 (6)
H13A0.03970.32620.08380.017*
C140.12110 (11)0.5554 (7)0.02905 (10)0.0129 (6)
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O1W0.0212 (12)0.026 (2)0.0148 (13)0.0000.0088 (11)0.000
O10.0162 (8)0.0197 (12)0.0120 (8)0.0010 (8)0.0081 (7)0.0009 (9)
O20.0175 (8)0.0233 (13)0.0119 (8)0.0030 (8)0.0070 (7)0.0049 (9)
O30.0252 (9)0.0244 (13)0.0129 (9)0.0047 (9)0.0128 (7)0.0005 (9)
C10.0164 (11)0.0117 (16)0.0152 (12)0.0029 (11)0.0086 (9)0.0007 (12)
C20.0161 (11)0.0175 (17)0.0154 (12)0.0018 (11)0.0079 (9)0.0004 (12)
C30.0158 (11)0.0165 (17)0.0180 (12)0.0008 (11)0.0106 (9)0.0006 (13)
C40.0217 (12)0.0167 (17)0.0129 (12)0.0037 (11)0.0117 (10)0.0019 (12)
C50.0189 (11)0.0174 (17)0.0139 (12)0.0006 (11)0.0064 (9)0.0015 (12)
C60.0165 (11)0.0155 (16)0.0171 (12)0.0000 (11)0.0102 (9)0.0002 (12)
C70.0157 (11)0.0130 (16)0.0120 (11)0.0012 (11)0.0044 (9)0.0005 (12)
C80.0170 (11)0.0128 (16)0.0109 (11)0.0002 (11)0.0069 (9)0.0009 (12)
C90.0166 (11)0.0099 (15)0.0122 (11)0.0013 (11)0.0068 (9)0.0019 (12)
C100.0155 (11)0.0102 (16)0.0122 (11)0.0019 (10)0.0073 (9)0.0035 (12)
C110.0198 (11)0.0156 (17)0.0128 (12)0.0003 (11)0.0097 (9)0.0008 (12)
C120.0202 (11)0.0100 (16)0.0116 (11)0.0006 (11)0.0060 (9)0.0013 (12)
C130.0140 (10)0.0140 (17)0.0152 (12)0.0010 (11)0.0065 (9)0.0015 (12)
C140.0178 (11)0.0114 (16)0.0130 (12)0.0010 (11)0.0099 (9)0.0017 (12)
Geometric parameters (Å, º) top
O1W—H1W10.92 (3)C5—C61.392 (3)
O1—C141.377 (3)C5—H5A0.9300
O1—C71.399 (3)C6—H6A0.9300
O2—C121.377 (3)C7—C81.365 (3)
O2—H2A0.8200C8—C91.436 (3)
O3—C41.377 (3)C8—C10i1.465 (3)
O3—H3A0.8200C9—C141.382 (3)
C1—C61.392 (3)C9—C101.406 (3)
C1—C21.403 (3)C10—C111.392 (3)
C1—C71.457 (3)C10—C8i1.465 (3)
C2—C31.388 (3)C11—C121.402 (3)
C2—H2B0.9300C11—H11A0.9300
C3—C41.386 (4)C12—C131.391 (3)
C3—H3B0.9300C13—C141.376 (4)
C4—C51.375 (3)C13—H13A0.9300
C14—O1—C7106.61 (17)O1—C7—C1114.32 (19)
C12—O2—H2A109.5C7—C8—C9105.6 (2)
C4—O3—H3A109.5C7—C8—C10i137.4 (2)
C6—C1—C2118.5 (2)C9—C8—C10i116.94 (19)
C6—C1—C7121.0 (2)C14—C9—C10121.3 (2)
C2—C1—C7120.4 (2)C14—C9—C8107.8 (2)
C3—C2—C1120.5 (2)C10—C9—C8130.8 (2)
C3—C2—H2B119.8C11—C10—C9116.5 (2)
C1—C2—H2B119.8C11—C10—C8i131.2 (2)
C4—C3—C2119.7 (2)C9—C10—C8i112.2 (2)
C4—C3—H3B120.2C10—C11—C12120.2 (2)
C2—C3—H3B120.2C10—C11—H11A119.9
C5—C4—O3117.2 (2)C12—C11—H11A119.9
C5—C4—C3120.8 (2)O2—C12—C13115.8 (2)
O3—C4—C3122.0 (2)O2—C12—C11120.6 (2)
C4—C5—C6119.5 (2)C13—C12—C11123.5 (2)
C4—C5—H5A120.3C14—C13—C12115.0 (2)
C6—C5—H5A120.3C14—C13—H13A122.5
C1—C6—C5121.0 (2)C12—C13—H13A122.5
C1—C6—H6A119.5C13—C14—O1127.5 (2)
C5—C6—H6A119.5C13—C14—C9123.3 (2)
C8—C7—O1110.7 (2)O1—C14—C9109.2 (2)
C8—C7—C1134.9 (2)
C6—C1—C2—C30.7 (4)C10i—C8—C9—C14178.9 (2)
C7—C1—C2—C3178.5 (3)C7—C8—C9—C10179.2 (3)
C1—C2—C3—C40.7 (4)C10i—C8—C9—C102.0 (5)
C2—C3—C4—C51.9 (4)C14—C9—C10—C111.7 (4)
C2—C3—C4—O3178.0 (3)C8—C9—C10—C11177.4 (3)
O3—C4—C5—C6178.1 (2)C14—C9—C10—C8i179.0 (2)
C3—C4—C5—C61.8 (4)C8—C9—C10—C8i1.9 (5)
C2—C1—C6—C50.8 (4)C9—C10—C11—C120.4 (4)
C7—C1—C6—C5178.5 (3)C8i—C10—C11—C12179.5 (3)
C4—C5—C6—C10.5 (4)C10—C11—C12—O2179.5 (2)
C14—O1—C7—C81.7 (3)C10—C11—C12—C131.2 (4)
C14—O1—C7—C1176.0 (2)O2—C12—C13—C14179.3 (2)
C6—C1—C7—C839.1 (5)C11—C12—C13—C141.3 (4)
C2—C1—C7—C8143.2 (3)C12—C13—C14—O1178.7 (3)
C6—C1—C7—O1138.0 (3)C12—C13—C14—C90.1 (4)
C2—C1—C7—O139.8 (4)C7—O1—C14—C13177.0 (3)
O1—C7—C8—C91.0 (3)C7—O1—C14—C91.7 (3)
C1—C7—C8—C9176.1 (3)C10—C9—C14—C131.6 (4)
O1—C7—C8—C10i177.4 (3)C8—C9—C14—C13177.7 (3)
C1—C7—C8—C10i5.5 (6)C10—C9—C14—O1179.6 (2)
C7—C8—C9—C140.1 (3)C8—C9—C14—O11.1 (3)
Symmetry code: (i) x+1/2, y+3/2, z.
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O1W—H1W1···O2ii0.92 (3)1.83 (3)2.720 (2)163 (3)
O3—H3A···O1Wiii0.821.892.703 (2)169
O2—H2A···O3iv0.822.002.716 (3)145
Symmetry codes: (ii) x, y+1, z+1/2; (iii) x, y+1, z; (iv) x, y+1, z1/2.

Experimental details

Crystal data
Chemical formulaC28H16O6·H2O
Mr466.42
Crystal system, space groupMonoclinic, C2/c
Temperature (K)100
a, b, c (Å)21.225 (4), 3.8500 (7), 25.353 (5)
β (°) 108.933 (4)
V3)1959.7 (6)
Z4
Radiation typeMo Kα
µ (mm1)0.11
Crystal size (mm)0.25 × 0.15 × 0.05
Data collection
DiffractometerBruker APEX DUO CCD area-detector
diffractometer
Absorption correctionMulti-scan
(SADABS; Bruker, 2009)
Tmin, Tmax0.972, 0.994
No. of measured, independent and
observed [I > 2σ(I)] reflections
7974, 2171, 1463
Rint0.082
(sin θ/λ)max1)0.649
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.068, 0.161, 1.07
No. of reflections2171
No. of parameters163
H-atom treatmentH atoms treated by a mixture of independent and constrained refinement
Δρmax, Δρmin (e Å3)0.27, 0.35

Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).

Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O1W—H1W1···O2i0.92 (3)1.83 (3)2.720 (2)163 (3)
O3—H3A···O1Wii0.821.892.703 (2)169
O2—H2A···O3iii0.822.002.716 (3)145
Symmetry codes: (i) x, y+1, z+1/2; (ii) x, y+1, z; (iii) x, y+1, z1/2.
 

Footnotes

Thomson Reuters ResearcherID: A-3561-2009.

§Additional correspondence author, e-mail: suchada.c@psu.ac.th. Thomson Reuters ResearcherID: A-5085-2009.

Acknowledgements

This project was supported by the Thailand Research Fund (grant Nos. DBG5280018 and RTA5380010). The authors are also very grateful to Associate Professor Srunya Vajrodaya, Head of Department of Botany, Faculty of Science, Kasetsart University, Thailand, for identification of the plant specimens. The authors also thank the Malaysian government and Universiti Sains Malaysia for the Research University Grant No. 1001/PFIZIK/811160.

References

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Volume 67| Part 6| June 2011| Pages o1392-o1393
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