Abstract
Hydrolysis of the saponin, isolated from the leaf of Rhodea japonica Roth, gave a sapogenin, m.p. 293-295° (decomp.), corresponding to formula C27H44O4. This sapogenin does not precipitate with digitonin but undergoes isomerization by alcoholic hydrochloric acid. From these and the fact that it easily gives a monobromo substitutent, it was assumed to be a dihydroxysteroidal sapogenin possessing a normal spiroketal side chain.
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