Maytensifolone, a new triterpene from maytenus distichophylla mart. ex reissek

摘要

Phytochemical study of the leaves of Maytenus distichophylla Mart. ex Reissek led to the isolation of the new triterpene 3,16,21-trioxo-6β,12a- dihydroxy-1-en-friedelane, named maytensifolone, along with the known triterpenes 3-oxofriedelane, 3,12-dioxofriedelane, 3β-hydroxyfriedelane, 3-oxo-29-hydroxyfriedelane, 3-oxo-12a-hydroxyfriedelane and 3-oxo- 30-hydroxyfriedelane. Their structural identification was based on spectroscopic methods and comparison with literature data.