Studies on the Constituents of "Senshokushichikon". II. Isolation and Structural Elucidation of Spirostane Derivatives

Three new spirostane steroids were obtained from a kind of chinese crude drug, "Senshokushichikon."On the basis of physicochemical properties and the results of couples of the reactions, the first compound, which was characterized as the acetate (I), mp 123-124°, C35H50O<11>, was elucidated to be Δ25(27)-pentrogenin acetate. The second compound (II), mp 122-125°, [α] D-93°, C33H52O9 and the third compound (III), mp 130-132°, [α] D-96°, C33H50O9 were shown to be 3-epi-ruscogenin 3-β-D-glucopyranoside and 2-epi-neoruscogenin 3-β-D-glucopyranoside, respectively.