3-Fluoro-2-methoxy-6-(trifluoromethoxy)pyridine
6-(Chloromethyl)-2-fluoro-3-(trifluoromethoxy)pyridine
3-(Chloromethyl)-5-(difluoromethyl)-2-methyl-4-(trifluoromethoxy)pyridine
6-(Chloromethyl)-2-(difluoromethyl)-4-methyl-3-(trifluoromethoxy)pyridine