Methyl 4-bromo-3-(bromomethyl)-2-(difluoromethyl)pyridine-5-carboxylate
Methyl 2-chloro-5-(difluoromethyl)-3-fluoropyridine-6-carboxylate
Methyl 6-chloro-4-(difluoromethyl)-2-fluoropyridine-3-carboxylate
Methyl 4-bromo-2-(bromomethyl)-6-(difluoromethyl)pyridine-3-carboxylate