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