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