1-Cortisone 17,21-dihydroxypregna-1,4-diene-3,11,20-trione 53-03-2 Dehydrocortisone InChI=1/C21H26O5/c1-19-7-5-13(23)9-12(19)3-4-14-15-6-8-21(26,17(25)11-22)20(15,2)10-16(24)18(14)19/h5,7,9,14-15,18,22,26H,3-4,6,8,10-11H2,1-2H Prednisone pregna-1,4-diene-3,11,20-trione, 17,21-dihydroxy-