Synonyms: A-Norpregn-3(5)-ene-2,20-dione(6CI,7CI,8CI); A-Nor-3-pregnene-2,20-dione; A-Norprogesterone;Dicyclopenta[a,f]naphthalen-2(3H)-one,6-acetyl-3a,3b,4,5,5a,6,7,8,8a,8b,9,10-dodecahydro-3a,5a-dimethyl-, [3aR-(3aa,3bb,5aa,6a,8ab,8ba)]-; NSC 48015