CAS No.17916-75-5 Chemical Name:Estr-5-en-17-one, 3-hydroxy-, (3B)- SynonymsEstr-5-en-17-one, 3-hydroxy-, (3B)-;(3S,8R,9S,10R,13S,14S)-3-hydroxy-13-methyl-1,2,3,4,7,8,9,10,11,12,13,14,15,16-tetradecahydro-17H-cyclopenta[A]phenanthren-17-one CBNumber:CB43060652 Molecular Formula:C18H26O2 Formula Weight:274.4