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