3-Cyano-2-(fluoromethyl)-5-(trifluoromethoxy)pyridine-4-carboxylic acid
5-Cyano-4-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-3-methanol
2-Cyano-5-(fluoromethyl)-6-(trifluoromethoxy)pyridine-3-carboxylic acid
4-Cyano-5-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-3-carboxylic acid