Compound inhibiting dipeptidyl peptidase IV
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United States of America Patent
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Mar 18, 2008
Grant Date -
Oct 12, 2006
app pub date -
Jan 30, 2004
filing date -
Jan 31, 2003
priority date (Note) -
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Abstract
A dipeptidyl peptidase IV inhibitor which is satisfactory in respect of activity, stability and safety and has an excellent action as a pharmaceutical agent. A compound represented by the following general formula or a pharmaceutically acceptable salt thereof: ##STR00001## wherein R.sup.1 and R.sup.2 each represents hydrogen, an optionally substituted C1-6 alkyl group, or --COOR.sup.5 whereupon R.sup.5 represents hydrogen or an optionally substituted C1-6 alkyl group, or R.sup.1, R.sup.2, and a carbon atom together represent a 3- to 6-membered cycloalkyl group, R.sup.3 represents hydrogen or an optionally substituted C6-10 aryl group, R.sup.4represents a hydrogen or a cyano group, D represents --CONR.sup.6-, --CO-- or --NR.sup.6CO--, R.sup.6 represents hydrogen or an optionally substituted C1-6 alkyl group, E represents --(CH.sub.2).sub.m-- whereupon m is 1 to 3, --CH.sub.2OCH.sub.2--, or --SCH.sub.2--, n is 0 to 3, and A represents an optionally substituted bicyclic heterocyclic group or bicyclic hydrocarbon group.
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