Phenolic compounds of Ononis arvensis the structure of onogenin

Summary From the roots ofOnonis arvensis L. a new isoflavone has been isolated with mp 213–214° C which has been called onogenin. On the basis of the results of a study of its UV, IR, NMR, and mass spectra, the structure of 7-hydroxy-6-methoxy-3,4-methylenedioxyisoflavanone is proposed for onogenin.Khar'kov State Pharmaceutical Institute. Khar'kov Scientific-Research Institute of Pharmaceutical Chemistry. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 354–357, May–June, 1975.