11-Ketoprogesterone
CHEMICAL COMPOUND
11-ketoprogesterone; 11-oxoprogesterone; 11-Oxoprogesterone; Ketogestin; U-1258; U 1258; U1258; Bio. 66; Bio 66; Pregn-4-ene-3,11,20-trione
11-Ketoprogesterone (brand name Ketogestin; former developmental code names Bio 66, U-1258), or 11-oxoprogesterone, also known as pregn-4-ene-3,11,20-trione, is a pregnane steroid related to cortisone (11-keto-17α,21-dihydroxyprogesterone) that was formerly used in veterinary medicine in the treatment of bovine ketosis. It was synthesized in 1940.