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