Crystalline solid form of (2S,5Z)-2-amino-7-(ethanimidoylamino)-2-methylhept-5-enoic acid
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United States of America Patent
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Feb 14, 2006
Grant Date -
Jul 8, 2004
app pub date -
Aug 22, 2003
filing date -
Aug 23, 2002
priority date (Note) -
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Abstract
(2S,5Z)-2-amino-7-(ethanimidoylamino)-2-methylhept-5-enoic acid is crystallized as an anhydrous, stoichiometric 1.5 HCl salt and a scaleable crystallization method is disclosed. The salt form was characterized and the absolute configuration of the chiral center was confirmed as 'S'. (2S,5Z)-2-amino-7-(ethanimidoylamino)-2-methylhept-5-enoic acid was high melting and appears acceptably non-hygroscopic for use in a pharmaceutical composition.
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