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