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