“…From the former he ob tained by oxidative degradation an allopregnanetrione-3,12,20, but Wagner et at. (99) find their product differs from allopregnantrione-3,12,20 synthe sized from desoxycholic acid and so question the suitability of butogenin as a precursor. The 16-dehydropregnen-5-ol-3-dione-12,20 prepared from rico genin by Marker (98) appears to be a desirable int�rmediate.…”