After the oxidation of A5-androsten-17P-ol-3-one 17-acetate% ethylene ketal (I) 3 with t-butyl chromate, the starting material I and an cu, p-unsaturated ketone I1 with a high ultraviolet absorption maximum (log 4.1) at 241 mp were isolated. The high absorption maximum of I1 indicated that the oxidation of I occurred on the allylic center of C-7 rather than of and the new product was, therefore, formulated as A5-androsten-17P-ol-3, 7-dione 17-acetate 3- ...
![(8R,9S,10R,13S,14S)-3-methoxy-10,13-dimethyl-2,8,9,11,12,14,15,16-octahydro-1H-cyclopenta[a]phenanthrene-7,17-dione Structure](https://image.chemsrc.com/caspic/307/7153-19-7.png)
