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