(1.BETA.,11.BETA.,16.BETA.)-21-(ACETYLOXY)-11-HYDROXY-1-METHOXY-2'-METHYL-5'H-PREGN-4-ENO(17,16-D)OXAZOLE-3,20-DIONE
(1.beta.,11.beta.,16.beta.)-21-(acetyloxy)-11-hydroxy-1-methoxy-2'-methyl-5'h-pregn-4-eno(17,16-d)oxazole-3,20-dione