2,3-Bis(trifluoromethyl)-5-(trifluoromethylthio)pyridine
3,4-Bis(trifluoromethyl)-5-(trifluoromethoxy)pyridine
5-Fluoro-4-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-3-carboxylic acid
3-Fluoro-4-(trifluoromethoxy)-5-(trifluoromethyl)pyridine-2-carboxylic acid