Clobetasone Butyrate EP Impurity I

Chemical Name: 17-O-isobutyryl clobetasone ; 21-chloro-9-fluoro-16β-methyl-3,11,20-trioxopregna-1,4-dien-17-yl 2-methylpropanoate; 17-O-isobutyryl clobetasone

Smile: CC(C)C(O[C@@](C(CCl)=O)([C@]1(C2)C)[C@@H](C)C[C@@]1([H])[C@]3([H])CCC4=CC(C=C[C@]4(C)[C@@]3(F)C2=O)=O)=O