Gefitinib iMpurity Gefitinib IMP 2-chloro-4-((3-chloro-4-fluorophenyl)amino)-7-methoxyquinazolin-6-yl acetate 4(3H)-Quinazolinone, 3-(3-chloro-4-fluorophenyl)-7-methoxy-6-[3-(4-morpholinyl)propoxy]- 3-(3-Chloro-4-fluorophenyl)-7-methoxy-6-(3-morpholinopropoxy)quinazolin-4(3H)-one 2-acetamido-5-acetoxy-4-methoxybenzoic acid N-(3-chloro-4-fluorophenyl)-5-hydroxy-4-methoxy-2-nitrobenzamide 2-amino-N-(3-chloro-4-fluorophenyl)-5-hydroxy-4-methoxybenzamide