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