Quinolinone derivative formulation and its production method
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United States of America Patent
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Mar 16, 2004
Grant Date -
May 8, 2003
app pub date -
Jun 24, 2002
filing date -
May 8, 2001
priority date (Note) -
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Abstract
The problem to be solved by the present invention is to provide a quinolinone derivative formulation, and its production method, having for its active ingredient the .beta. crystal form and/or .gamma. crystal form of the quinolinone derivative represented with chemical formula (I), which is useful as a pharmaceutical, and particularly as an antiallergic, which has superior bioabsorption and stability. The present invention provides a quinolinone derivative, and its production method, having for its active ingredient the .beta. crystal form and/or .gamma. crystal form of the quinolinone derivative represented with chemical formula (I): ##STR1##
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