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