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

Methyl 4-oxo-1,4-dihydro-3-quinolinecarboxylate

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

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