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