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