Methyl 2-hydroxy-3-nitro-4-(trifluoromethoxy)pyridine-5-carboxylate
4-Hydroxy-5-nitro-3-(trifluoromethoxy)pyridine-2-carboxylic acid
Ethyl 6-hydroxy-2-nitro-4-(trifluoromethoxy)pyridine-3-carboxylate
3-Hydroxy-4-nitro-2-(trifluoromethoxy)pyridine-5-carboxylic acid