(1.BETA.,10.ALPHA.,11.BETA.,16.BETA.)-21-(ACETYLOXY)-1,11-EPOXY-2'-METHYL-5'H-PREGN-4-ENO(17,16-D)OXAZOLE-2,20-DIONE
(1.beta.,10.alpha.,11.beta.,16.beta.)-21-(acetyloxy)-1,11-epoxy-2'-methyl-5'h-pregn-4-eno(17,16-d)oxazole-2,20-dione