(6aR,6bS,8aS,8bS,11aR,12aS,12bS)-8b-(2-hydroxyacetyl)-6a,8a-dimethyl-10-propyl-6b,8,8a,8b,11a,12,12a,12b-octahydro-1H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxole-4,7(2H,6aH)-dione,(6aR,6bS,8aS,8bS,11aR,12aS,12bS)-8b-(2-hydroxyacetyl)-6a,8a-dimethyl-10-propyl-6b,8,8a,8b,11a,12,12a,12b-octahydro-1H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxole-4,7(2H,6aH)-dione,11-Keto Budesonide is an impurity of Budesonide , an antiinflammatory agent. Impurity in commercial preparations of Budesonide,Budesonide Therapeutic