An E-ring gamma-lactone pentacyclic triterpene from Myrianthus serratus

摘要

A novel gamma-lactone triterpenoid has been isolated from the methylated ethyl acetate extract of the trunk wood of Myrianthus serratus, as well as friedelin and four known pentacyclic triterpenoid acids, all as their methyl esters. Their structures were elucidated by 2D NMR experiments.