Chemische und Chemotaxonomische Untersuchungen von Filices. XL. Chemische Untersuchungen der Inhaltsstoffe von Microlepia marginata (PANZER) C. CHR.

Abstract

From the fronds of Microlepia marginata (PANZER) C. CHR. five new ent-kaurane type diterpene glycosides, microlepin (I), 17-O-acetylmicrolepin (VIII), 6'-O-acetylmicrolepin (IX), 4-epi-microlepin (X) and 6'-O-α-L-rhamnopyranosyl-4-epi-microlepin (XVIII) were isolated and their structures were elucidated by spectroscopic methods and some chemical reactions. Microlepin and 4-epi-microlepin possesses the structures 16α, 17, 19-trihydroxy-ent-kaurane 19-O-β-(4'-O-methyl)-D-glucopyranoside and 16α, 17, 18-trihydroxy-ent-kaurane 18-O-β-(4'-O-methyl)-D-glucopyranoside.