Petatrichol B: A Pentacyclic Triterpenoid with Unusual Skeleton from Petasites tricholobus

摘要

A novel pentacyclic triterpenoid, petatrichol B, was isolated from the rhizome of Petasites tricholobus. Its structure was established by means of spectroscopic analysis (EIMS, HRSIMS, IR, 1D NMR and 2D NMR).