Definition: C18 steroid with androgenic and anabolic properties. It is generally prepared from alkyl ethers of ESTRADIOL to resemble TESTOSTERONE but less one carbon at the 19 position.
Other names Nortestosterone; Norandrostenolone; Estrenolone; 19-Nortestosterone; 17beta Hydroxy 19 Nor 4 Androsten 3 One; 17beta-Hydroxy-19-Nor-4-Androsten-3-One; 17-Hydroxy-Estr-4-Ene-3-One
dienogest [ 17 alpha-cyanomethyl-17 beta-hydroxy-13 beta-methylgona-4,9-dien-3-one,17 alpha-cyanomethyl-17 beta-hydroxyestra-4,9(10)-diene-3-one,STS 557,STS-557 ] structure given in first source