Methanolic extract of the root of Pueraria Thunbergiana BENTH. (Japanese origin), and of P. pseudo-hirsuta TANG et WANG, and P. Thomsonii BENTH. (Chinese origin) was treated by the lead salt method and the portion precipitating with basic lead acetate afforded daidzein, m. p. 320° (decomp.), daidzin, m. p. 215-217° (decomp.), substance-e as needles, m. p. 187° (decomp.), C21H20O9, and substance-f as hygroscopic prisms. Substances e and f were assumed to be hitherto unknown isoflavone derivatives from their coloration characteristics and ultraviolet spectral examinations.
No takes yet. Share an insight, caveat, or question.
Shibata et al. (1959) studied this question.