18353-76-9 3-Doxyl-5-alpha-cholestane 3-Doxylcholestane 3-Spiro(2'-(N-oxyl-4,4'-dimethyloxazolidine))cholestane 4,4'-Dimethylspiro(5-cholestane-3,2'-oxazolidin)-3'-oxyl IK-1 Cpd Spiro(cholestane-3,2'-oxazolidin)-3'-yloxy, 4',4'-dimethyl-, (5alpha)-