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