5-(Difluoromethyl)-3-fluoro-4-nitro-2-(trifluoromethoxy)pyridine
5-(Difluoromethyl)-4-fluoro-3-iodo-2-(trifluoromethoxy)pyridine
3-(Difluoromethyl)-5-fluoro-2-nitro-4-(trifluoromethoxy)pyridine
3-(Difluoromethyl)-2-fluoro-5-iodo-6-(trifluoromethoxy)pyridine