Oxogestone phenpropionate (OPP; ) (former developmental code name or tentative brand name Oxageston), also known as xinogestone, as well as 20β-hydroxy-19-norprogesterone 20β-(3-phenylpropionate), is a progestin related to the 19-norprogesterone derivatives which was developed as an injectable hormonal contraceptive, specifically a progestogen-only injectable contraceptive, in the 1960s and early 1970s but was never marketed.Heeres, S. G. (1967). Preliminary results with a long-acting progestational preparation. In: Wood, C. and Walters, W.A., eds. Fifth World Congress of Gynaecology and Obstetrics, Sydney, September 1967. New York Appleton-Century-Crofts, 1967. p. 348 http://www.popline.org/node/475027 It was studied at a dose of 50 to 75 mg once a month by intramuscular injection but was associated with a high failure rate with this regimen and was not further developed. OPP is the 20β-(3-phenylpropionate) ester of oxogestone, which, similarly, was never marketed.

See also List of progestogen esters

References