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