Abstract
Steroidal sapogenins of the aerial parts of a clone of D.tenuipes complex derived from a plant collected at Hitoyoshi were found to consist almost exclusively of neotokorogenin. A samll amount of neoyonogenin was also isolated from these parts, but diotigenin, tenuipegenin and 25D sapogenins were not found. Sapogenins found in the underground parts were all mixtures of 25D and 25L sapogenins, the main sapogenins being neotokorogenin and tokorogenin, yamogenin and diosgenin being found only in traces. A saponin isolated from a benzene extract of the aerial parts was confirmed to be neotokorogenin 1-O-α-L-arabinopyranoside.
