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