Ethyl 5-hydroxy-2-oxo-1,2-dihydropyridine-3-carboxylate
Ethyl 4,6-dimethyl-2-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 6-(difluoromethyl)-4-iodo-3-methylpyridine-2-carboxylate
5-(Difluoromethyl)-2-(trifluoromethyl)pyridine-3-carboxylic acid
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