2-Bromo-3-fluoro-4-(fluoromethyl)-5-(trifluoromethoxy)pyridine
3-Bromo-5-(chloromethyl)-2-fluoro-4-(trifluoromethoxy)pyridine
3-Bromo-2-(chloromethyl)-5-fluoro-6-(trifluoromethoxy)pyridine
6-Bromo-3-(chloromethyl)-4-fluoro-2-(trifluoromethoxy)pyridine