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
4-Chloro-6-(difluoromethyl)-3-methylpyridine-2-sulfonyl chloride