3-Chloro-2-cyano-4-(difluoromethyl)-5-(trifluoromethoxy)pyridine
2-Chloro-3-cyano-5-(difluoromethyl)-6-(trifluoromethoxy)pyridine
5-Chloro-2-cyano-3-(fluoromethyl)-4-(trifluoromethoxy)pyridine
4-Chloro-2-cyano-3-(fluoromethyl)-5-(trifluoromethoxy)pyridine