3-Cyano-2-(trifluoromethoxy)-5-(trifluoromethyl)pyridine-6-carboxylic acid
3-Cyano-2-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-5-carboxylic acid
4-Cyano-3-(difluoromethyl)-6-(trifluoromethoxy)pyridine-2-acetonitrile
3-(Difluoromethyl)-2-fluoro-6-(trifluoromethoxy)pyridine-5-acetonitrile