4-(Fluoromethyl)-3-hydroxy-6-(trifluoromethoxy)pyridine-2-carboxylic acid
3-Hydroxy-2-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-5-acetic acid
6-Hydroxy-3-nitro-4-(trifluoromethoxy)-2-(trifluoromethyl)pyridine
6-Hydroxy-2-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-3-acetic acid