2-Chloro-4-nitro-5-(trifluoromethoxy)-3-(trifluoromethyl)pyridine
5-Bromo-2-(difluoromethyl)-3-(trifluoromethoxy)-6-(trifluoromethyl)pyridine
4-Bromo-3-(difluoromethyl)-2-(trifluoromethoxy)-6-(trifluoromethyl)pyridine
4-Chloro-2-methoxy-3-(trifluoromethoxy)-5-(trifluoromethyl)pyridine