PHLOROGLUCINOL DERIVATIVES OF ELEVEN<i>DRYOPTERIS</i>SPECIES FROM JAPAN

Abstract

Phloroglucinol derivatives of eleven Dryopteris species from Japan have been investigated. Aspidin AB, trisdesaspidin BBB, trisflavaspidic acid, methylene-bis-aspidinol, and trisaspidinol have been found for the first time in Japanese Dryopteris. D. erythrosora is unique among the Dryopteris species examined so far in containing isobutyryl (iB) side chain homologues. The phloroglucinol derivatives of the eleven Dryopteris taxa investigated have been compared with those of related taxa on a world-wide basis.