| Synonyms: | 21-Dehydro Budesonide;(11β,16α)-16,17-[Butylidenebis(oxy)]-11-hydroxy-3,20-dioxopregna-1,4-dien-21-al;Budesonide IMpurity D;16α,17-[(1RS)-butylidenebis(oxy)]-11β-hydroxy-3,20-dioxopregna-1,4-dien-21-al;Budesonide Impurity 4(Budesonide EP Impurity D);Budesonide EP Impurity D;Pregna-1,4-dien-21-al, 16,17-[butylidenebis(oxy)]-11-hydroxy-3,20-dioxo-, (11β,16α)-;2-((6aR,6bS,7S,8aS,8bS,11aR,12aS,12bS)-7-hydroxy-6a,8a-dimethyl-4-oxo-10-propyl-2,4,6a,6b,7,8,8a,8b,11a,12,12a,12b-dodecahydro-1H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-8b-yl)-2-oxoacetaldehyde |