crystalline fractions eluted with Skêlly-B-benzene 1:1 were homogeneous on thin layer chromatography (52^ yield). A secondary acetate group was still present (5.77f^> 2.09, and m,-IH), A nitro group was probably present (64.97 m, IH). The presence of a C-4-double bond was indicated by a multiplet at S5*72 (IE). The structure for this compound is probably 6-nitrocholest-4-ene-3A-ol acetate. A mixture of epimers at the 6 position was expected since the compound did not readily crystallize. Eventually the éf'-epimer was obtained crystalline with mp 97-99° and the correct analysis. A third compound was obtained by further elution with likewise had a secondary acetate group (5*75f>, 6^.27) and an unsaturated ketone (5.91» 6.10)/). A C-4 double bond was also suspected (^5»99» IK). The structure consonant with this data is cholest-4-ene-6-one-3P-ol acetate. The)kmax Ac0^ 6-nitrocholest-4-ene-3^^ol acetate 6^^ and 6|®-N02 in 1:1 ratio (NO, 2 benzene-ether 95s5 in 3*4^ yield, mp 106^110°. This material cholest-4-ene-6-one-3A-ol acetate 0
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