API
IMPURITY
CHEMICAL NAME
STRUCTURE
2
Pioglitazone

EP Impurity C

5-(4-(2-(5-ethylpyridin-2-yl)ethoxy)benzyl)-3-(2-(5-ethylpyridin-2-yl)ethyl)thiazolidine-2,4-dione Pioglitazone_EP-Impurity-C
Pioglitazone

EP Impurity B

5-{4-[2-(5-Ethyl-2-pyridinyl) ethoxy]benzylidene}-2,4-thiazolidinedione Pioglitazone_EP-Impurity-B
Pioglitazone

Pioglitazone Imino Impurity

5-(4-(2-(5-ethylpyridin-2-yl)ethoxy)benzyl)-4-iminothiazolidin-2-one Pioglitazone-Imino-Impurity
Pioglitazone

Pioglitazone Impurity

5-{4-[2-(5-Ethyl-2-pyridyl)ethoxy]benzyl}-4-[4-[2-(5-ethyl-2-pyridyl)ethoxy]phenoxy]-2,5-dihydro-1,3-thiazole-2-one Pioglitazone-Impurity