Abstract
Investigation of the roots of Lotus polyphyllos Clarke resulted in the isolation of two new isoflavone derivatives; 4′-O-methylerythrinin C (3) and 4′-O-methyl-2′′-hydroxydihydroalpinumisoflavone (4). In addition, the three known isoflavone derivatives 4′-O-methylalpinumisoflavone (1) lupinalbin F (5), 4′,7-dimethoxy-5-hydroxyisoflavone (6), and the phenylpropanoid ester tetracosyl p-coumarate (2) were also identified. The structures were determined from spectroscopic data.