2-[(3R,4S,5S,8S,9S,10S,11R,13R,14S,16S)-16-Ethylsulfanyl-3,11-dihydroxy-4,8,10,14-tetramethyl-hexadecahydro-cyclopenta[a]phenanthren-(17Z)-ylidene]-6-methyl-hept-5-enoic acid 生成 2-[(3R,4S,5S,8S,9S,10S,11R,13R,14S,16S)-16-Ethanesulfinyl-3,11-dihydroxy-4,8,10,14-tetramethyl-hexadecahydro-cyclopenta[a]phenanthren-(17Z)-ylidene]-6-methyl-hept-5-enoic acid