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