PROCESS FOR PREPARING HIGH PURITY 7?,17?-17-HYDROXY-7-METHYL-19-NOR-17-PREGN-510-EN-20-YN-3-ONE

摘要

The invention relates to a basic granulate comprising (7 alpha ,17 alpha )-17-hydroxy-7-methyl-19-nor-17-pregn-5(10)-en-20-yn-3-one, characterized in that the said granulate comprises (7 alpha ,17 alpha )-17-hydroxy-7-methyl-19-nor-17-pregn-4-en-20-yn-3-one in an amount less than 0.5% and the amount of water incorporated in the granulate ranges from 5.5 - 7 %. This basic granulate can be used for preparing stable pharmaceutical dosage units.