Name Flumethasone Synonyms 6a,9a-Difluoro-16a-methyl-11b,17a,21-trihydroxy-1,4-pregnadiene-3,20-dione; 6a,9a-Difluoro-16a-methylprednisolone; 6alpha-Fluorodexamethasone Molecular Formula C22H28F2O5 Molecular Weight 410.46 CAS Number 2135-17-3 EINECS 218-370-9 Corticosteroids anti-inflammatory drug