英文别名Afatinib impurity 2; Afatinib Impurity J; (2E)-4-(Dimethylamino)-N-{4-oxo-7-[(3S)-tetrahydro-3-furanyloxy]-1,4-dihydro-6-quinazolinyl}-2-butenamide; (S,E)-4-(dimethylamino)-N-(4-oxo-7-((tetrahydrofuran-3-yl)oxy)-3,4-dihydroquinazolin-6-yl)but-2-enamide; 2-Butenamide, N-[3,4-dihydro-4-oxo-7-[[(3S)-tetrahydro-3-furanyl]oxy]-6-quinazolinyl]-4-(dimethylamino)-, (2E)- 
