Triamcinolone Acetonide EP Impurity B

Chemical Name: 9-Fluoro-11β,21-dihydroxy-16α,17-(1-methylethylidenedioxy)pregna-1,4,14-triene-3,20-dione (as per EP) ; (9-Fluoro-11,21-dihydroxy-16,17-[(1-methylethylidene)bis(oxy)]-(11β,16α)-pregna-1,4,14-triene-3,20-dione) (as per USP)