2-Chloro-3-nitro-5-(trifluoromethoxy)pyridine-4-sulfonamide
4-Chloro-2-nitro-5-(trifluoromethoxy)pyridine-3-sulfonyl chloride
3-Chloro-5-nitro-4-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-Chloro-2-nitro-5-(trifluoromethoxy)pyridine-4-sulfonyl chloride