Budesonide Impurity 04 Catalogue B501484 CAS 577777-51-6 M.W 446.54 M.F C25H34O7 Specifications FAQs Synonyms:(2S,6aR,6bS,7S,8aS,8bS,11aR,12aS,12bS)-2,7-Dihydroxy-8b-(2-hydroxyacetyl)-6a,8a-dimethyl-10-propyl-1,2,6a,6b,7,8,8a,8b,11a,12,12a,12b-dodecahydro-4H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-4-one