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