3-cephem derivative crystal
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United States of America Patent
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May 3, 2005
Grant Date -
Apr 15, 2004
app pub date -
Oct 7, 2003
filing date -
Sep 30, 1999
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Abstract
A 3-cephem derivative crystal which is a clathrate compound comprising p-methoxybenzyl ester of 7-phenylacetamide-3-formyl-3-cephem-4-carboxylic acid and dimethylformamide and a process for preparing the 3-cephem derivative crystal.
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