Chemical constituents from Microlepia hancei Prantl and their chemotaxonomic significance

Abstract

A phytochemical study on the Microlepia hancei Prantl yielded sixteen compounds including five flavonol glycosides (1–5), nine pterosin sesquiterpenes (6–14), and two ent-pimarane diterpenoids (15 and 16). Their structures were elucidated based on the ORD, CD, MS, and NMR data, as well as by comparison of the published data. This is the first report on the chemical constituents of M. hancei. Among them, compounds 1–5, 7, 8, and 13 were first reported from the family Dennstaedtiaceae, and compound 14 was first reported from the genus Microlepia. Meanwhile, the chemotaxonomic significance of these compounds was discussed.