<unk> , also known as 9α-fluorocortisol (9α-fluorohydrocortisone) or as 9α-fluoro-11β,17α,21-trihydroxypregn-4-ene-3,20-dione, is a synthetic pregnane steroid and a halogenated derivative of cortisol (11β,17α,21-trihydroxypregn-4-ene-3,20-dione). Specifically, it is a modification of cortisol with a fluorine atom substituted in place of one hydrogen atom at the C9α position. Fluorine is a good bioisostere for hydrogen because it is similar in size, with the major difference being in its electronegativity. The acetate form of<unk> ,<unk>  acetate, is the C21 acetate ester of<unk> , and is hydrolyzed into<unk>  in the body.
Fludrocortisone
Cortisone acetate
Cortisone
Desoxycorticosterone acetate
Testosterone enanthate
Methandriol
Calcipotriol
Hydrocortisone aceponate