2-(Fluoromethyl)-3-hydroxy-6-nitro-5-(trifluoromethoxy)pyridine
4-(Chloromethyl)-3-hydroxy-5-nitro-2-(trifluoromethoxy)pyridine
5-(Chloromethyl)-2-fluoro-3-(trifluoromethoxy)pyridine-4-methanol
5-(Chloromethyl)-4-fluoro-3-(trifluoromethoxy)pyridine-2-methanol