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