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