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