Methyl 4-(difluoromethyl)-2,3-dimethoxypyridine-5-carboxylate
Ethyl 4-(difluoromethyl)-3-(trifluoromethyl)pyridine-2-carboxylate
2-(Difluoromethyl)-3,5-dimethoxypyridine-4-carboxylic acid
Ethyl 4-(difluoromethyl)-2-(trifluoromethyl)pyridine-3-carboxylate