9,11-EPOXY-1,21-DIHYDROXY-4,16-DIMETHYL-19-NORPREGNA-1,3,5(10)-TRIEN-20-ONE, (9.BETA.,11.BETA.,16.ALPHA.)-
9,11-epoxy-1,21-dihydroxy-4,16-dimethyl-19-norpregna-1,3,5(10)-trien-20-one, (9.beta.,11.beta.,16.alpha.)-