Isolation, Structure Elucidation, and Absolute Configuration of 26-Deoxyactein from <i>Cimicifuga </i><i>r</i><i>acemosa</i> and Clarification of Nomenclature Associated with 27-Deoxyactein

Abstract

A new triterpene glycoside, 26-deoxyactein (1), along with two known compounds, 23-epi-26-deoxyactein (2), previously designated as "27-deoxyactein", and actein (3), were isolated from the roots/rhizomes of Cimicifuga racemosa. The structures and absolute stereochemistry of 1 and 2 were established by spectroscopic methods (FABMS, (1)H and (13)C NMR) and single-crystal X-ray data analysis.