| Abstrakt: |
The two α-ketolic steroids R3and R4, previously described by de Courcy, Bush, Gray & Lunnon [1953], and which lack the Δ4-3-keto group, have been identified as tetrahydrocortisol (5β-pregnane-3α:11β:17α:21-tetrol-20-one) and tetrahydrocortisone (5β-pregnane-3α:17α:21-triol-11:20 dione). The Δ4-3-ketone, X3, is shown to be identical with Reichstein's compound E (Δ4-pregnene-11β:17α:20β21-tetrol-3-one). X4has chromatographic properties resembling Reichstein's compound U (Δ4-pregnene-17α:20β:21-triol-3:11-dione). |
