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