CAS NO:2152-44-5 Betamethasone 17-valerate Name Betamethasone 17-valerate Synonyms 1,4-Pregnadiene-11b,17a,21-triol-9a-fluoro-16b-methyl-3,20-dione 17-valerate; 9-Fluoro-11beta,17,21-trihydroxy-16beta-methylpregna-1,4-diene-3,20-dione 17-valerate Molecular Formula C27H37FO6 Molecular Weight 476.58 CAS Registry Number 2152-44-5 EINECS 218-439-3 Description White or almost white crystalline powder Specific Rotation +75