5,11β-Dihydroxy-6β-methyl-17,20:20,21-bis(methylenedioxy)-cyclic ethylene acetal 5α-Pregnan-3-one is an intermediate in the synthesis of β-Μethyl Prednisolone 21-Acetate (M326031), which is a 6-methyl isomer of 6α-Methyl Prednisolone 21-Acetate (M326030).