7 17-17--7--19--17--510--20--3- HIGH PURITY COMPOSITION COMPRISING 717-17-HYDROXY-7-METHYL-19-NOR-17-PREGN-510-EN-20-YN-3-ONE

摘要

The present invention relates to a process for the preparation of high purity compositions of (7α, 17α) -17-hydroxy-7-methyl-19-nor-17-pre-5-ene-20- . The method of the present invention provides a composition comprising less than 0.5% of (7α, 17α) -17-hydroxy-7-methyl-19-nor-17- do. The present compositions may be used as a source for the preparation of stable pharmaceutical dosage units.