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