Pioglitazone EP Impurity F

Chemical Name: Pioglitazone bis-Ether Impurity ; bis[4-(5-Thiazolidinedion-yl)methylphenyl] ether ; 5-(4-[4-(5-Thiazolidinedion-yl)methylphenoxy]benzyl) thiazolidine-2,4-dione ;

Smile: O=C1NC(SC1CC2=CC=C(OC3=CC=C(C=C3)CC(C(N4)=O)SC4=O)C=C2)=O