Alisol C 23-acetate from the rhizome of Alisma orientale

作者：Zhan Zha Jun; Bian Hong Ling; Shan Wei Guang^*

来源：Acta Crystallographica Section E-Structure Reports Online, 2008, 64(11): O2231-U3008.

DOI：10.1107/S1600536808032959

The title compound [systematic name: 11 beta-hydroxy-24,25-epoxy-3,16-oxo-protost-13 (17)-en-23-yl acetate], C(32)H(48)O(6), a protostane-type triterpenoid, was isolated from the Chinese herbal medicine alismatis rhizoma (the rhizome of Alisma orientalis Juzep). The molecule contains four trans-fused rings, viz. three six-membered and one five-membered ring. Two of the six-membered rings have slightly distorted half-chair conformations, while the third exhibits a chair conformation. The five-membered ring is almost planar. An intermolecular O-H center dot center dot center dot O hydrogen bond between the hydroxy and epoxy groups and intra- and intermolecular C-H center dot center dot center dot O hydrogen bonds are observed.

• 出版日期2008-11
• 单位浙江工业大学