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Methyl 4-(2-methoxy-2-oxoethyl)-2-methyl-5-oxo-4,5-dihydro-1h-pyrrole-3-carboxylate

Methyl 4-(2-methoxyphenyl)-4-oxobutanoate

Methyl 4-(2-oxopropyl)phenoxyacetate

Methyl 4-(2-oxopyrrolidin-1-yl) butanoate

Methyl 4-(2-pyridinyl)benzoate

Methyl 4-(3,4-diaminophenoxy)benzenecarboxylate

Methyl 4-(3-methyl-1,2,4-oxadiazol-5-yl)benzoate

Methyl 4-(3-oxo-3-phenyl-1-propenyl) benzoate

Methyl 4-(3-pyridinyl)benzoate

Methyl 4-(4-(bis(2-hydroxyethyl)amino)phenyl)butyrate