5-Hydroxy-2-nitro-4-(trifluoromethoxy)pyridine-3-acetic acid
3-(Bromomethyl)-5-hydroxy-2-methyl-4-(trifluoromethoxy)pyridine
4-Hydroxy-5-nitro-2-(trifluoromethoxy)pyridine-3-acetic acid
5-Fluoro-2-(fluoromethyl)-4-(trifluoromethoxy)-3-(trifluoromethyl)pyridine