Betamethasone Valerate EP Impurity E 

Chemical Name: Betamethasone Valerate USP  RC A ; Betamethasone 21-Valerate ; 9-Fluoro-11β,17-dihydroxy-16β-methyl-3,20-dioxopregna-1,4-dien-21-yl pentanoate ;

Smile: CCCCC(OCC([C@@]1(O)[C@@H](C)C[C@@]2([H])[C@]3([H])CCC4=CC(C=C[C@]4(C)[C@@]3(F)[C@@H](O)C[C@]12C)=O)=O)=O