Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
September 21, 2010
Patent Application Number
11721282
Date Filed
December 16, 2005
Patent Primary Examiner
Patent abstract
A stereoselective process for preparing 7-[(E)-t-butyloxyiminomethyl]-camptothecin (also known as gimatecan) is herein disclosed. With the addition of further dissolution and precipitation steps carried out in appropriate different solvent mixtures, four new crystalline forms of gimatecan are also obtainable by using the same stereoselective process.
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