4,6-dichloro-3-(4-hydroxy-4-oxobutyl)-1H-indole-2-carboxylic acid
4,6-dichloro-3-(4-hydroxy-4-oxo-butyl)-1H-indole-2-carboxylic acid
4,6-dichloro-3-(4-hydroxy-4-keto-butyl)-1H-indole-2-carboxylic acid