Methyl 3-(difluoromethyl)-2-nitro-6-(trifluoromethoxy)pyridine-4-carboxylate
2-Methyl-3-nitro-6-(trifluoromethoxy)pyridine-5-sulfonamide
3-Methyl-4-nitro-2-(trifluoromethoxy)pyridine-6-sulfonyl chloride
2-Methyl-3-nitro-5-(trifluoromethoxy)pyridine-4-sulfonamide