(S)-2-((1R,3As,7Ar,E)-4-((E)-2-((3S,5R)-3,5-Bis(Tert-Butyldimethylsilyloxy)-2-Methylenecyclohexylidene)Ethylidene)-7A-Methyloctahydro-1H-Inden-1-Yl)Propanal
(5E,7E)-(1S,3R,20S)-1,3-bis<<(1,1-dimethylethyl)dimethylsilyl>oxy>-20-methyl-9,10-secopregna-5,7,10(19)-trien-21-al; (5E,7E)-(1S,3R)-1,3-bis(tertbutyldimethylsilyloxy)-9,10-secopregna-5,7,10(19)-trien