Abstract

The structure of pachysandiol-A, a new triterpenediol isolated from the neutral fraction of Pachysandra terminalis SIEB. et ZUCC. (Buxaceae), was investigated and assigned to the formula I on the basis of chemical and spectroscopic evidences. In this connection, the 2-hydroxyl group of cerin, for which 2β (equatorial)-orientation had been proposed, was proved to have the axial 2α-configuration.

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