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