Adrenosterone-13C3 ((+)-Adrenosterone-13C3) is the 13C-labeled Adrenosterone (HY-17462). Adrenosterone ((+)-Adrenosterone) is a competitive hydroxysteroid (11-beta) dehydrogenase 1 (HSD11beta1) inhibitor. Adrenosterone is a steroid hormone with weak androgenic effect. Adrenosterone is a dietary supplement that can decrease fat and increase muscle mass. Adrenosterone acts as a suppressor of metastatic progression of human cancer cells[1][2][3].