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