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Ethyl 2-(t-BOC-amino)oxazole-5-carboxylate

Ethyl 7-chloro-4-hydroxy-8-methyl-3-quinolinecarboxylate

Ethyl 6-chloroimidazo[1,2-b]pyridazine-2-carboxylate

Ethyl 2-chlorooxazole-4-carboxylate

Ethyl 5-(4-chlorophenyl)oxazole-4-carboxylate

Ethyl 5-(2,3-dichlorophenyl)oxazole-4-carboxylate

Ethyl 6,8-difluoro-4-hydroxyquinoline-3-carboxylate

Ethyl 1-(ethoxymethyl)-1H-imidazole-4-carboxylate

Ethyl 4-hydroxy-6-methoxyquinoline-3-carboxylate

Ethyl imidazo[1,2-a)pyridine-7-carboxylate