REVISED STRUCTURES OF SOYASAPOGENOLS A, B, AND E, OLEANENE-SAPOGENOLS FROM SOYBEAN. STRUCTURES OF SOYASAPONINS I, II, AND III

Abstract

The structures of soyasapogenols A, B, and E, three of five hitherto isolated sapogenols of soybean (Glycine max Merrill), were re-investigated. Based on the chemical and X-ray analyses, it has been shown that the structures of soyasapogenols A, B, and E should be partly revised respectively from 1', 2', and 3'to 1, 2, and 3 and consequently the structures of soyasaponins I, II, and III are expressed as 6, 7, and 8.