(8S,9S,10R,14S)-13-ethyl-11-methylidene-1,2,3,6,7,8,9,10,12,14,15,16-dodecahydrocyclopenta(a)phenanthren-17-one

It is used mainly as an intermediate in steroid synthesis and medicinal chemistry for developing hormone analogs or derivatives. (8S,9S,10R,14S)-13-Ethyl-11-methylidene-…-17-one is a synthetic steroidal ketone featuring an 11-methylene group and an ethyl substitution at the 13-position.

API Name Desogestrel
CAS No 54024-21-4
Molecular Formula C20H28O
Molecular Weight 284.4 g/mol
Synonyms (8S,9S,10R,14S)-13-ethyl-11-methylidene-1,2,3,6,7,8,9,10,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-17-one