Chemical Name: (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-12b-Acetoxy-9,11-dihydroxy-4,6-dimethoxy-4a,8,13,13-tetramethyl-5-oxo-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxet-12-yl (Z)-pent-3-enoate
Synonym: Pioglitazone bis-Ether Impurity ; bis[4-(5-Thiazolidinedion-yl)methylphenyl] ether ; 5-(4-[4-(5-Thiazolidinedion-yl)methylphenoxy]benzyl) thiazolidine-2,4-dione ;