(8S,9S,10R,11S,13R,14S,17R)-11,17-dihydroxy-17-(2-hydroxyacetyl)-10-methyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-13-carbaldehyde; (11beta)-11,17,21-trihydroxy-3,20-dioxopregn-4-en-18-al,(8S,9S,10R,11S,13R,14S,17R)-11,17-dihydroxy-17-(2-hydroxyacetyl)-10-methyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-13-carbaldehyde; (11beta)-11,17,21-trihydroxy-3,20-dioxopregn-4-en-18-al,cortisol Impurity