Acta Crystallographica Section C

Crystal Structure Communications

Volume 62, Part 4 (April 2006)

organic compounds

gz3003 scheme

Acta Cryst. (2006). C62, o219-o221 [ doi:10.1107/S0108270106007177 ]

Cinnamolid-3-ol hemihydrate and 3-hydroxycinnamolide acetate, two drimanolide-class sesquiterpene lactones from Warburgia ugandensis

Y.-X. Zhang, S. H. Jackson, M. S. Rajab, F. R. Fronczek and S. F. Watkins

Abstract: 3 [beta] -Hydroxy-7-drimen-12,11-olide hemihydrate, C₁₅H₂₂O₃·0.5H₂O, (I), has two sesquiterpene molecules and one water molecule in the asymmetric unit. The OH groups of both molecules and both H atoms of the water molecule are involved in near-linear intermolecular hydrogen bonds, having OO distances in the range 2.632 (3)-2.791 (2) Å. 3 [beta] -Acetoxy-7-drimen-12,11-olide, C₁₇H₂₄O₄, (II), has its ring system in very nearly the same conformation as the two molecules of (I).

Formula: C₁₅H₂₂O₃·0.5H₂O and C₁₇H₂₄O₄


	Structure factor file (CIF format) (260.4 kbytes) [ doi:10.1107/S0108270106007177/gz3003Isup2.hkl ] Contains datablock I

	Structure factor file (CIF format) (117.9 kbytes) [ doi:10.1107/S0108270106007177/gz3003IIsup3.hkl ] Contains datablock II

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