3-(Bromomethyl)-4-cyano-6-(trifluoromethoxy)pyridine-2-acetic acid
3-(Bromomethyl)-2-cyano-6-(trifluoromethoxy)pyridine-4-acetic acid
3-(Bromomethyl)-2-cyano-4-(trifluoromethoxy)pyridine-6-acetic acid
2-(Bromomethyl)-5-cyano-3-(trifluoromethoxy)pyridine-6-acetic acid