3-(Chloromethyl)-5-hydroxy-6-nitro-2-(trifluoromethoxy)pyridine
2-(Bromomethyl)-5-fluoro-6-(trifluoromethoxy)pyridine-3-acetic acid
2-(Bromomethyl)-5-fluoro-4-(trifluoromethoxy)pyridine-3-acetic acid
6-(Bromomethyl)-4-fluoro-2-(trifluoromethoxy)pyridine-3-acetic acid