2-butenoic acid, 4-[(4-chloro-2-formylphenyl)amino]-4-oxo-, ethyl ester, (2E)- InChI=1/C13H12ClNO4/c1-2-19-13(18)6-5-12(17)15-11-4-3-10(14)7-9(11)8-16/h3-8H,2H2,1H3,(H,15,17)/b6-5 ethyl (2E)-4-[(4-chloro-2-formylphenyl)amino]-4-oxobut-2-enoate