United States Pharmacopeia (USP) Reference Standard Synonym(s): 1,4-Pregnadiene-17α,21-diol-3,11,20-trione; 1-Cortisone; 17α,21-Dihydroxy-1,4-pregnadiene-3,11,20-trione; Dehydrocortisone Empirical Formula: C21H26O5 Formula Weight: 358.43 Linear Formula:...