Methyl 6-chloro-2-cyano-4-(difluoromethyl)pyridine-3-carboxylate
2-(Bromomethyl)-4-chloro-3-(difluoromethyl)-5-fluoropyridine
Methyl 2-chloro-5-cyano-6-(difluoromethyl)pyridine-3-carboxylate
2-(Bromomethyl)-3-chloro-6-(difluoromethyl)-4-fluoropyridine