Abstract
A new triterpenoid triol having a homoannular diene together with the known longispinogenin have been isolated, as minor components, by acid hydrolysis of the saponin from the roots of Bupleurum falcatum L. The new triol, saikogenin B, has been shown to have the structure olean-9(11),12-diene-3β,16β,28-triol. In the course of the structure elucidation, the epimeric 11-OH derivatives of longispinogenin were prepared and the results compared with those described for β-amyrin.
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