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