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Methyl 4-chloropyridin-2-ylcarbamate

Methyl 4-chlorosalicylate

Methyl 4-cyano-2,5-dimethylpyrrole-3-carboxylate

Methyl 4-cyano-3-cyclohexecarboxylate

Methyl 4-cyano-3-fluorobenzoate

Methyl 4-cyano-5-(methylthio)thiophene-2-carboxylate

Methyl 4-deoxy-4-fluoro-alpha-d-glucoside

Methyl 4-diethylaminobenzoate

Methyl 4-dimethylaminobenzoate

Methyl 4-ethylbenzoate

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