2-Chloro-6-fluoro-3-(trifluoromethoxy)pyridine-5-sulfonyl chloride
4-Bromo-3-(chloromethyl)-2-(difluoromethyl)-5-(trifluoromethoxy)pyridine
5-Bromo-3-(chloromethyl)-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine
3-Bromo-2-(chloromethyl)-5-(difluoromethyl)-6-(trifluoromethoxy)pyridine