Pharmaceutical Studies on Japanese Ferns containing Phloroglucinol Derivatives. (8). : On the Constituents of Dryopteris polylepis

Abstract

Four phloroglucinol derivatives were isolated from Dryopteris polylepis (FR. et SAV.) C. CHR. (Aspidiaceae). One of them was identified as flavaspidic acid AB, which was found to be a major compound. This is the first time that it was isolated as crystals from a natural source. The other phloroglucinol derivatives were identified as albaspidin BB, filixic acid BBB, and dryocrassin.