Ethyl 2-(difluoromethyl)-5-methyl-4-(trifluoromethyl)pyridine-3-carboxylate
Methyl 2-(difluoromethyl)-5-methyl-3-(trifluoromethyl)pyridine-6-carboxylate
Ethyl 2-(difluoromethyl)-4-methyl-6-(trifluoromethyl)pyridine-3-carboxylate
Methyl 6-(difluoromethyl)-4-methyl-2-(trifluoromethyl)pyridine-3-carboxylate