Oxygen-containing heterocyclic compounds
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United States of America Patent
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Apr 23, 2002
Grant Date -
Dec 27, 2001
app pub date -
Mar 1, 2001
filing date -
Sep 3, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to oxygen-containing heterocyclic compounds represented by the following formula (I): ##STR1## wherein m represents an integer of 0 to 4; R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent a hydrogen atom, substituted or unsubstituted lower alkyl, etc.; R.sup.5 represents substituted or unsubstituted lower alkoxy etc.; R.sup.6 represents a hydrogen atom etc.; and Y represents the following formula (II): ##STR2## wherein R.sup.9 represents cyano etc., R.sup.10 represents a hydrogen atom etc., R.sup.11 represents carboxy etc., and R.sup.12 represents a hydrogen atom etc.; and the like; or pharmaceutically acceptable salts thereof.
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