Acta Cryst. (2010). E66, o2161 [ doi:10.1107/S1600536810029831 ]
Abstract: The title compound, C18H26O7, is an eremophilenolide which has been isolated from the plant Ligularia duciformis for the first time. The present study confirms the atomic connectivity assigned on the basis of 1H and 13C NMR spectroscopy. The molecule contains three fused rings, two six-membered rings in chair confomations and a five-membered ring in a flattened envelope conformation. Two hydroxy groups are involved in formation of intra- and intermolecular O-HO hydrogen bonds. The latter ones link molecules into chains propagating in .
Online 31 July 2010
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