3-(Difluoromethyl)-4-iodo-2-methoxypyridine-6-sulfonamide
2-(Difluoromethyl)-6-nitro-5-(trifluoromethoxy)pyridine-3-carbonyl chloride
6-Chloro-2-hydroxy-3-(trifluoromethoxy)-4-(trifluoromethyl)pyridine
6-Chloro-4-oxo-1,4-dihydropyridine-3-carboxylic acid