Constituents of Cimicifugae Rhizoma. I. Isolation and Characterization of Ten New Cycloartenol Triterpenes from Cimicifuga heracleifolia Komarov.

Abstract

Ten new highly oxidized cycloartane-type triterpenoids, 24-epi-7, 8-didehydrocimigenol, 7, 8-didehydrocimigenol, 25-O-acetyl-7, 8-didehydrocimigenol, 3-keto-24-epi-7, 8-didehydrocimigenol, 2', 4'-O-diacetyl-24-epi-7, 8-didehydrocimigenol-3-xyloside, 3'-O-acetyl-24-epi-7, 8-didehydrocimigenol-3-xyloside, 24-epi-7, 8-didehydrocimigenol-3-xyloside, 7, 8-didehydro-24-O-acetylhydroshengmanol-3-xyloside, 24-epi-acerinol and heracleifolinol, were isolated from the rhizome of Cimicifuga heracleifolia KOMAROV and their structures were determined by the use of two-dimensional nuclear magnetic resonance (2D NMR) techniques (1H-1H correlation spectroscopy (COSY), 1H-13C COSY, 1H-13C long-range COSY) and by X-ray diffraction analysis of the 3-keto compound.