4-Hydroxy-3-nitro-5-(trifluoromethoxy)pyridine-2-carboxylic acid
2-Hydroxy-5-methoxy-3-(trifluoromethoxy)pyridine-6-carboxylic acid
3-(Chloromethyl)-6-fluoro-2-(trifluoromethoxy)pyridine-5-carboxaldehyde
2-Hydroxy-4-methoxy-6-(trifluoromethoxy)pyridine-3-carboxylic acid