Ethyl 4-cyano-6-hydroxy-3-(trifluoromethoxy)pyridine-2-carboxylate
5-(Bromomethyl)-2-(difluoromethyl)pyridine-4-sulfonamide
3-Cyano-4-(difluoromethyl)-5-methylpyridine-2-sulfonyl chloride
2-Amino-4-(chloromethyl)-5-(difluoromethyl)pyridine-3-carboxylic acid