Abstract
Irifloside (III), C23H22O12·H2O, mp 177-178°, a new isoflavone glycoside, has been isolated from the rhizoma of Iris florentina L. (Iridaceae) together with iriflophenone (II), irisolone (IV), irisflorentin (I), iristectorigenin B (V), irigenin (VI) and iridin (VII). The structure of irifloside (III) has been determined as 5, 4'-dihydroxy-3'-methoxy-6, 7-methylenedioxyisoflavone-4'-O-β-D-glucoside by chemical degradation and spectral means, and its aglycone, C17H12O7, mp 221-223°, was named iriflogenin (VIII). The structure of iriflophenone (II), C13H10O5, mp 207-208°, has been determined as 2, 4, 6, 4'-tetrahydroxybenzophenone by spectral means.
