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