Fulvestrant Fulvestrant Synonyms: (7a,17b)-7-[9-[(4,4,5,5,5-pentafluoropentyl)sulfinyl]nonyl]estra-1,3,5(10)-triene-3,17-diol CAS NO.: 129453-61-8 Formula: C41H65O4F5S2 Weight: 781.0744