22-Hydroxy Mifepristone (RU 42698) is an orally active hydroxylated alcohol metabolite that exhibits both anti-progestational and anti-glucocorticoid activities. This compound contains an alkyne group and is capable of undergoing copper-catalyzed azide-alkyne cycloaddition (CuAAC) with azide-containing molecules. Furthermore, 22-Hydroxy Mifepristone demonstrates a relative binding affinity of 48% to the human glucocorticoid receptor.