Phytochemical investigation of the rhizomes of Dryopteris crassirhizoma

A comprehensive phytochemical investigation of the rhizomes of Dryopteris crassirhizoma Nakai resulted in the isolation and identification of one new trimeric phloroglucinol, trisflavaspidic acid ABB (1) together with 12 known compounds including phloroglucinol, flavan, terpene, phenolic and acyclic analogs. Their structures were established by spectroscopic methods including IR, UV, MS and 1D and 2D NMR. (C) 2008 Phytochemical Society of Europe Published by Elsevier B.V. All rights reserved.