Chemische und Chemotaxonomische Untersuchungen der Pterophyten. XLIV. Chemische Untersuchungen der Inhaltsstoffe von Microlepia marginata (PANZER) C. CHR. (2)

Abstract

The reinvestigation of Microlepia marginata (PANZER) C. CHR. afforded in addition to the previously reported ent-kaurane glycosides three new ent-pimarene derivatives, which were named fumotoshidin A (I), B (II) und C (III). The structures of the new compounds were characterized by spectroscopic methods and some chemical transformations as 2β, 15 (R), 16-trihydroxy-entpimar-7-en-3-one (1), 3α, 15 (R), 16-trihydroxy-ent-pimar-7-en-2-one (II) and 2, 15 (R), 16-trihydroxy-ent-pimar-1, 7-dien-3-one (III).