1722-54-9 19-Nor-17.alpha.-pregn-4-ene-21-carboxylic acid, 17-hydroxy-3-oxo-, .gamma.-lactone 19-Norpregn-4-ene-21-carboxylic acid, 17-hydroxy-3-oxo-, .gamma.-lactone, (17.alpha.)- NSC70586 SC 8109