Revised structures of the triterpenes Q, T, and U from Salacia prinoides DC; X-ray crystal structure of triterpene T

Abstract
An X-ray study of triterpene T(C30H48O3) has shown that the related compounds Q, T, and U which are derivatives of 1,3-diketofriedelane have their third oxygen function at C(26) intead of C(24) as previously proposed; rings D and E occur in a cis-fused boat–boat (‘trimaran’) conformation.

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