<unk>  (), also known as 20β-hydroxy-19-norprogesterone, is a progestin of the 19-norprogesterone group which was synthesized in 1953 and was developed as an injectable hormonal contraceptive in the early 1970s but was never marketed. A C20β phenylpropionate derivative,<unk>  phenpropionate, also exists.
Oxogestone
Medrogestone
Hermaphrodite 
Medicinal clay
Bone cement
Phospho soda
Hydroxyapatite
Neurite