英文别名Pioglitazone Impurity 6; Pioglitazone EP Impurity F; 5,5'-[Oxybis(4,1-phenylenemethylene)]bis(1,3-thiazolidine-2,4-dione); Des[(5-ethyl-2-pyridinyl)ethyl] Pioglitazone Dimer Ether Impurity; 5-[[4-[4-[(2,4-dioxo-1,3-thiazolidin-5-yl)methyl]phenoxy]phenyl]methyl]-1,3-thiazolidine-2,4-dione; 5-(4-[4-(5-Thiazolidinedion-yl)methylphenoxy]benzyl) thiazolidine-2,4-dione; Pioglitazone Impurity F 
