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. 2011 Nov;67(Pt 11):o2957.
doi: 10.1107/S160053681104150X. Epub 2011 Oct 12.

6β,8β-Dihy-droxy-eremophil-7(11)-en-8α,12-olide

Zhan-Xin Zhang  1 , Dong-Qing Fei
Affiliations

6β,8β-Dihy-droxy-eremophil-7(11)-en-8α,12-olide

Zhan-Xin Zhang et al. Acta Crystallogr Sect E Struct Rep Online. 2011 Nov.

Abstract

The title compound, C(15)H(22)O(4), an eremophilane sesquiternoid, was isolated from the roots of Ligularia virgaurea. Both six-membered rings (A and B) adopt chair conformations and the five-membered ring is almost planar (r.m.s. deviation = 0.016 Å). The two methyl and two hy-droxy groups adopt a syn conformation and the A/B ring junction is cis-fused. An intra-molecular O-H⋯O hydrogen bond generates an S(6) ring. In the crystal, O-H⋯O hydrogen bonds link the mol-ecules into [100] chains.

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Figures

Fig. 1.
Fig. 1.
The molecular structure of the title compound showing 30% probability displacement ellipsoids.
See this image and copyright information in PMC

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