17.beta.-acyl-17.alpha.-propynyl-11.beta.-(cyclic amino) aryl steroids and their derivatives having antagonist hormonal properties
Bibliography
Cook, C., Kepler, J., & O'Reilly, J. M. (2004). IPC No. U.S.17.beta.-acyl-17.alpha.-propynyl-11.beta.-(cyclic amino) aryl steroids and their derivatives having antagonist hormonal properties (Patent No. 6740645.)
The invention is directed to a novel class of17.beta.-acyl-17.alpha.-propynyl steroids which exhibit potentantiprogestational activity.