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