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