Synonyms: Imatinib Mesilate Imp. A (EP), (2E)-3-(Dimethylamino)-1-(pyridin-3-yl)prop-2-ene-1-one, 3-Dimethylamino-1-(3-pyridyl)-2-propen-1-one, Imatinib Imp. A (EP), 2-Propen-1-one, 3-(dimethylamino)-1-(3-pyridinyl)-, (2E)-, Imatinib Mesilate Impurity A, Imatinib Impurity A