11beta,21-dihydroxy-16alpha,17-(isopropylidenedioxy)pregna-1,4-diene-3,20-dione 21-(hydrogen succinate)

21-(3-Carboxy-1-oxopropoxy)-11β-hydroxy-16α,17-[(1-methylethylidene)bis(oxy)]pregna-1,4-diene-3,20-dione