11-beta,17-alpha,21-trihydroxy-6-alpha-methylpregn-4-ene-3,20-dione 11β,17,21-Trihydroxy-6α-methylpregn-4-ene-3,20-dione 6α-Methylhydrocortisone (6S,8S,9S,10R,11S,13S,14S,17R)-11,17-dihydroxy-17-(2-hydroxyacetyl)-6,10,13-trimethyl-2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthren-3-one (6S,8S,9S,10R,11S,13S,14S,17R)-11,17-dihydroxy-17-(2-hydroxyethanoyl)-6,10,13-trimethyl-2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthren-3-one (6S,8S,9S,10R,11S,13S,14S,17R)-17-glycoloyl-11,17-dihydroxy-6,10,13-trimethyl-2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthren-3-one Methylprednisolone EP IMP F Methylprednisolone EP Impurity F