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