2-Hydroxy-5-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-4-acetic acid
6-Hydroxy-4-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-2-acetic acid
4-Hydroxy-3-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-6-acetonitrile
2-Hydroxy-4-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-5-acetic acid