Methyl 6-(chloromethyl)-2-(difluoromethyl)pyridine-3-carboxylate
Methyl 6-(chloromethyl)-3-(difluoromethyl)pyridine-2-carboxylate
Methyl 2-(chloromethyl)-4-(difluoromethyl)pyridine-6-carboxylate
3-(Difluoromethyl)-2,4-diiodopyridine-6-carbonyl chloride