17-Hydroxy-6.alpha.-methylpregn-4-en-20-one acetate 3137-73-3 6-Methyl-20-oxopregn-4-en-17-yl acetate AIDS-125478 AIDS125478 Anagestone acetate Anatropin NSC73880 ORF 1658 Pregn-4-en-20-one, 17-(acetyloxy)-6-methyl-, (6.alpha.)- Pregn-4-en-20-one, 17-hydroxy-6.alpha.-methyl-, acetate