4-(Difluoromethyl)-3-hydroxy-2-(trifluoromethoxy)pyridine-6-acetic acid
4-(Difluoromethyl)-2-hydroxy-6-(trifluoromethoxy)pyridine-3-acetic acid
6-(Difluoromethyl)-2-hydroxy-3-(trifluoromethoxy)pyridine-4-carboxylic acid
2-(Aminomethyl)-4-iodo-6-(trifluoromethoxy)pyridine-3-carboxylic acid