N.sup..epsilon. -trifluoroacetyl-L-lysyl-L-proline.D-10-camphorsulfonic acid salt and process for producing the same
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United States of America Patent
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Sep 19, 1989
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N/A
app pub date -
May 26, 1988
filing date -
May 29, 1987
priority date (Note) -
Expired
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Abstract
N.sup..epsilon. -Trifluoroacetyl-L-lysyl-L-proline.D-10-camphorsulfonic acid salt is produced in very high purity by reacting N.sup..epsilon. -trifluoroacetyl-L-lysyl-L-proline with D-10-camphorsulfonic acid in a suitable solvent, followed by crystallization from the reaction mixture. The salt is extremely stable at a temperature of working ambience as compared with other salts of N.sup..epsilon. -trifluoroacetyl-L-lysyl-L-proline including known dicyclohexylamine salt of the same.
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