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