3-(Bromomethyl)-6-hydroxy-4-(trifluoromethoxy)pyridine-2-acetic acid
4-(Bromomethyl)-3-hydroxy-2-(trifluoromethoxy)pyridine-5-acetic acid
5-(Fluoromethyl)-4-iodo-2-methyl-3-(trifluoromethoxy)pyridine
4-(Bromomethyl)-2-hydroxy-3-(trifluoromethoxy)pyridine-5-acetic acid