Chemical Name: 5-{4-[2-(5-Ethyl-2-pyridinyl) ethoxy] benzylidene}-2,4-thiazolidinedione ;(5Z)-5-[[4-[2-(5-Ethylpyridin-2-yl)ethoxy]phenyl]methylene]thiazolidine-2,4-dione
Synonym: Didehydro Pioglitazone Impurity
Smile: O=C(NC/1=O)SC1=C/C2=CC=C(OCCC3=NC=C(CC)C=C3)C=C2