脱氧可的松

(10,13-dimethyl-1,2,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydrospiro[cyclopenta[a]phenanthrene-3,2'-[1,3]dioxolan]-17-yl)(1,3-dioxolan-2-yl)methanone

Pregna-4,20-dien-3-one

硫酸

4β-bromo-5β-pregnane-3,20-dione