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