3-Hydroxy-2-methoxy-5-(trifluoromethoxy)pyridine-6-acetic acid
3-Hydroxy-5-nitro-6-(trifluoromethoxy)pyridine-2-acetic acid
3-Fluoro-6-nitro-2-(trifluoromethoxy)-4-(trifluoromethyl)pyridine
5-Fluoro-2-nitro-4-(trifluoromethoxy)-3-(trifluoromethyl)pyridine