(3R)-4'-(2 nitrophenylselenomethyl)dihydrospiro-[5α-cholestane-3,3'(2H')-furan]-2'-one

5-Alpha-胆甾烷-3-酮

diethyl 5α-cholestan-3-ylidenemalonate

(3R)-4'-hydroxymethyldihydrospiro-[5α-cholestane-3,3'(2'H)-furan]-2'-one

diethyl (3α-cyano-5α-cholestan-3β-yl)malonate