Bolandiol dipropionate (USAN; brand names Anabiol, Storinal; former development code SC-7525; also known as bolandiol propionate (JAN), norpropandrolate, 19-nor-4-androstenediol dipropionate, or estr-4-ene-3ò,17ò-diol 3,17-dipropionate) is a synthetic anabolic-androgenic steroid (AAS) and derivative of 19-nortestosterone (nandrolone). It is an androgen ester â specifically, the 3,17-dipropionate ester of bolandiol (19-nor-4-androstenediol).