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