2-oxo-2-((6aR,6bS,8aS,8bS,11aR,12aS,12bS)-6a,8a,10-trimethyl-4,7-dioxo-2,4,6a,6b,7,8,8a,8b,11a,12,12a,12b-dodecahydro-1H-naphtho[2',1':4,5]indeno[1,2-d]oxazol-8b-yl)ethyl acetate; (16Beta)-21-(Acetyloxy)-2'-methyl-5'H-Pregna-1,4-dieno[17,16-d]oxazole-3,11,20-trione,deflazacort Impurity