Chemische und chemotaxonomische Untersuchungen von Filices. XXXIV. Chemische Untersuchungen der Inhaltsstoffe von Pteris purpureorachis COPEL.

Abstract

From the fronds of Pteris purpureorachis COPEL. three new ent-atisane type diterpenes, pteroatisene P₁, P₂ and pteroatisenoside P₁, were isolated. Their structures were elucidated using some chemical transformations, spectroscopic methods and X-ray crystallographic analysis as ent-9-hydroxy-15-oxo-atis-16-en-19-oic acid, ent-9, 15α-dihydroxy-atis-16-en-19-oic acid and ent-9-hydroxy-15-oxo-atis-16-en-19-oic acid-β-D-glucosylester.