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