Triamcinolone Acetonide EP Impurity C

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