Chemische und Chemotaxonomische Untersuchungen der Pterophyten. LII. Chemische Untersuchungen der Inhaltsstoffe von Scypholepia hookeriana J. SM.

Abstract

The fronds of Scypholepia hookeriana J. SM. (Microlepia hookeriana (WALL.) PRESL) afforded four oligoglycosides of a new ent-pimarane-type diterpene, which were named hookerosides A (I), B (II), C (III) and D (IV). The structures were elucidated by means of chemical reactions and spectroscopic methods to be 3α-[O-(3-O-methyl)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinofuranosyloxy]-12α-[(3-O-methyl)-β-D-quinovopyranosyloxy]-(I), 3α-[O-(3-O-methyl)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinofuranosyloxy]-12α-[β-D-fucopyranosyloxy]-(II), 3α-[O-(3-O-methyl)-β-D-glucopyranosyl-(1→2)-α-L-arabinofuranosyloxy]-12α-[β-D-fucopyranosyloxy]-(III) and 3α-[O-β-D-fucopyranosyl-(1→3)-O-β-D-fucopyranosyl (1→2)-α-L-arabinofuranosyloxy]-12α-[β-D-fucopyranosyloxy]-(IV) ent-pimara-8 (14), 15-diene.