2-Bromo-3-nitro-4-(trifluoromethoxy)pyridine-6-sulfonamide
5-Bromo-2-nitro-3-(trifluoromethoxy)pyridine-6-sulfonyl chloride
2-(Aminomethyl)-3-chloro-6-nitro-5-(trifluoromethoxy)pyridine
4-Bromo-3-nitro-6-(trifluoromethoxy)pyridine-2-sulfonyl chloride