英文别名Gon-4-ene-3,17-dione, 13-ethyl-11-Methylene-; Etonogestrel Impurity 3; Etonogestrel Related CoMpound A; (8S,9S,10R,14S)-13-Ethyl-11-methylene-7,8,9,10,11,12,13,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene-3,17(2H,6H)-dione; (8S,9S,10R,14S)-13-ethyl-11-methylidene-2,6,7,8,9,10,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene-3,17-dione 
