[Studies on chemical constituents from Glycyrrhiza paliddiflora Maxim]

Five compounds were isolated from the rhizome of Glycyrrhiza pallidiflora Maxim. Four of them were elucidated by spectroscopic and chemical methods as beta-sitosterol (II), macedonic acid methyl ester (III), 21-dehydro-macedonic acid methyl ester (IV) and 5-hydroxy-4'-methoxy isoflavone (V). VI was isolated for the first time as a natural compound, named pallidifloric acid methyl ester. V is a new compound, named pallidiflorin. Studies of the chemical structure of II are in progress.