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