4-(Difluoromethyl)-2-nitro-6-(trifluoromethyl)pyridine-3-sulfonyl chloride
2-Bromo-3-(bromomethyl)-5-(difluoromethyl)-4-methoxypyridine
2-(Difluoromethyl)-4-nitro-6-(trifluoromethyl)pyridine-3-sulfonyl chloride
5-Chloro-3-cyano-2-(trifluoromethoxy)pyridine-4-sulfonyl chloride