17-.alpha.-Methyltrienolone 17-.beta.-Hydroxy-17-methylestra-4,9,11-trien-3-one 17.alpha.-Methyltrienolone 965-93-5 Estra-4,9,11-trien-3-one, 17-hydroxy-17-methyl-, (17.beta.)- Estra-4,9,11-trien-3-one, 17.beta.-hydroxy-17-methyl- Methyl trienolone Methyltrienolone Metribolone NSC92858 R 1881 RU 1881