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.
View full abstract