胆固醇

(2R,5S,8R,9S,10S,13R,14S,17R)-10,13-dimethyl-17-((R)-6-methylheptan-2-yl)-2-(phenylselanyl)hexadecahydro-3H-cyclopenta[a]phenanthren-3-one

5'-benzhydryl-spiro[cholestan-3,2'-[1,3]oxathiolane]

丁酮

5α-cholesta-3-one 3α-O-oxathiolane