2-Fluoro-3-(fluoromethyl)-5-methoxy-4-(trifluoromethoxy)pyridine
4-(Chloromethyl)-2-fluoro-5-methoxy-3-(trifluoromethoxy)pyridine
3-(Chloromethyl)-5-fluoro-4-methoxy-2-(trifluoromethoxy)pyridine
3-(Chloromethyl)-2-fluoro-5-methoxy-4-(trifluoromethoxy)pyridine