1-Methoxycarbonyl-1,2-dihydro-4-hydroxy-quinoline-3-carboxylic acid methyl ester

methyl 2-[(3-methoxy-3-oxopropyl)amino]benzoate

methyl 3-[N-acetyl-(o-methoxycarbonyl)anilino]propanoate

methyl 2-((3-methoxy-3-oxopropyl)(methoxycarbonyl)amino)benzoate

dimethyl 1-(N-phenylamino)-ethene-1,2-dicarboxylate