22-Hydroxy mifepristone - HY-131543

22-Hydroxy Mifepristone (RU 42698) is an orally active hydroxylated alcoholic metabolite with antiprogestational and antiglucocorticoidal activities, which contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups. The relative binding affinity of 22-Hydroxy Mifepristone to the human glucocorticoid receptor is 48%[1][2].