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