Ethyl 3-chloro-2-cyano-4-(difluoromethyl)pyridine-6-carboxylate
Ethyl 2-chloro-4-cyano-6-(difluoromethyl)pyridine-3-carboxylate
Methyl 4-chloro-2-cyano-3-(difluoromethyl)pyridine-6-carboxylate
2-Chloro-3-(difluoromethyl)-4-methylpyridine-5-sulfonamide