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