130917-92-9 19-Norpregn-9-ene-3,20-dione, 5-methyl-, (5-beta)- 19-Norpregn-9-ene-3,20-dione, 5-methyl-, (5beta)- 5-beta-Methyl-19-norpregn-9(10)-ene-3,20-dione BRN 4198423