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