6-(Bromomethyl)-4-cyano-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine
3-Cyano-6-nitro-4-(trifluoromethoxy)pyridine-2-sulfonyl chloride
4-Cyano-3-nitro-2-(trifluoromethoxy)pyridine-5-sulfonyl chloride
4-Cyano-2-nitro-3-(trifluoromethoxy)pyridine-5-sulfonyl chloride