Constituents of Ephemerantha lonchophylla; Isolation and Structure Elucidation of New Phenolic Compounds, Ephemeranthol-A, Ephemeranthol-B, and Ephemeranthoquinone, and of a New Diterpene Glucoside, Ephemeranthoside

Abstract

Constituents of Ephemerantha lonchophylla (hook, f.) P. f. huntet summerh, which is used as a source plant of the Chinese crude drug “Shi-Hu”, were examined and four new phenolic compounds, 3-0-methylgigantol (2), ephemeranthoquinone (3), ephemeranthol-A (5), and ephemeranthol-B (7), and a new diterpene glucoside named ephemeranthoside (9) were isolated along with four known compounds, denbinobin (1), 4,7-dihydroxy-2,3-di-methoxyphenanthrene (4), erianthridin (6), and gigantol (8). The structures of the new compounds were determined on the basis of spectroscopic data. © 1991, The Pharmaceutical Society of Japan. All rights reserved.