3642-85-1 6.alpha.-Methyl-11-oxoprogesterone FDA 0070 NSC17256 Pregn-4-ene-3,11,20-trione, 6-methyl-, (6.alpha.)- Pregn-4-ene-3,11,20-trione, 6.alpha.-methyl- Progesterone, 6.alpha.-methyl-11-oxo- SKI 22936 U 7654