Synonyms: BRN 3160642;4-Chloro-19-norprogesterone;4-Chloro-19-norpregn-4-ene-3,20-dione;19-Norpregn-4-ene-3,20-dione, 4-chloro-;AC1MI53A;LS-97385;4-07-00-02390 (Beilstein Handbook Reference);(8R,9S,10R,13S,14S,17S)-17-acetyl-4-chloro-13-methyl-2,6,7,8,9,10,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-one;99950-46-6