11beta,17,21-Trihydroxypregn-4-ene-3,20-dione 21-cyclopentanepropionate 17-Hydroxycorticosterone 21beta-cyclopentylpropionate 508-99-6 Cortef fluid Cortef oral suspension Cortisol 21-cyclopentanepropionate Cortisol, 21-cyclopentanepropionate (8CI) EINECS 208-091-0 HYDROCORTISONE CYPIONATE Hydrocortisone 21beta-cyclopentanepropionate Hydrocortisone cyclopentyl propionate NSC 10721 Pregn-4-ene-3,20-dione, 21-(3-cyclopentyl-1-oxopropoxy)-11,17-dihydroxy-, (11beta)-