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