Chemical and Chemotaxonomical Studies on Filices. LV. Studies on the Constituents of Several Species of Pteris

Abstract

The investigation of several species of genus Pteris (Pteris tremula R. BR., P. dactylina HOOK., P. angustipinna TAGAWA P. multifida POIR., P. grevilleana WALL. and P. cretica L.) afforded a new ent-kaurane type diterpene and two new indanone type sesquiterpenes in addition to the previously known compounds. Their structures were elucidated to be 12β-hydroxy-15-oxo-ent-kaur-16-en-19-oic acid β-D-glucopyranosylester (I), pterosin S 3-O-β-D-glucoside (III) and pterosin S 3-O-β-D-(4'-caffeoyl) glucoside (IV) mainly by spectroscopic methods.