4-Hydroxy-6-nitro-3-(trifluoromethoxy)pyridine-2-carboxamide
4-Hydroxy-2-nitro-3-(trifluoromethoxy)pyridine-6-carboxamide
5-Hydroxy-3-nitro-2-(trifluoromethoxy)pyridine-4-carboxamide
5-Hydroxy-2-nitro-4-(trifluoromethoxy)pyridine-3-carboxamide
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