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Ethyl 4-phenyl-5-(trifluoromethyl)thiophene-2-carboxylate

Ethyl 4-oxotetrahydro-2h-pyran-3-carboxylate

Ethyl 4-oxo-4h-pyrido[3,4-d][1,3]oxazine-2-carboxylate

Ethyl 4-oxo-4h-pyrido[2,3-d][1,3]oxazine-2-carboxylate

Ethyl 4-oxo-3,4-dihydropyrido[3,4-d]pyrimidine-2-carboxylate

Ethyl 4-oxo-3,4-dihydropyrido[2,3-d]pyrimidine-2-carboxylate

Ethyl 4-oxo-1-phenethylpiperidine-3-carboxylate hydrochloride

Ethyl 4-oxo-1,4-dihydroquinoline-6-carboxylate

Ethyl 4-oxo-1,4-dihydropyrrolo[1,2-b]pyridazine-3-carboxylate

Ethyl 4-methylpicolinate

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