6α-Methyl-20(R)-hydroxy Prednisolone 21-Acetate-d5 is the isotope labelled analog of 6α-Methyl-20(R)-hydroxy Prednisolone 21-Acetate (M312955); a metabolite of 6α-Methyl Prednisolone (M325934) which is a glucocorticoid that displays anti-inflammatory and antioxidant properties and attenuates apoptosis in oligodendrocytes after injury. Also neuroprotective. Molecular Formula: C24H29D5O6 Molecular Weight: 423.55