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