英文别名9α-Fluoro-11β,17α,21-trihydroxy-16β-methylpregn-4-ene-3,20-dione 17,21-dipropionate; Betamethasone Dipropionate EP Impurity I; 9-Fluoro-11β-hydroxy-16β-methyl-3,20-dioxopregn-4-ene-17,21-diyl dipropanoate; 1,2-Dihydro-Betamethasone 17,21-Dipropionat; Betamethasone Dipropionate Impurity