3-Amino-2-(difluoromethyl)-5-(trifluoromethoxy)pyridine-4-acetonitrile
4-Bromo-3-cyano-2-(difluoromethyl)-6-(trifluoromethoxy)pyridine
4-Bromo-2-cyano-3-(difluoromethyl)-6-(trifluoromethoxy)pyridine
3-Bromo-5-cyano-6-(difluoromethyl)-2-(trifluoromethoxy)pyridine