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