16β-?Methyl-?17,?20:20,?21-?bis(methylenedioxy)?-pregn-?4-?ene-?3,?11-?dione is an intermediate for the synthesis of 16-Methyl Epiprednisolone (M304315), which is a metabolite of Prednisolone (P703740); a synthetic corticosteroid that is metabolically interconvertible with Prednisone (P703780).