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