5-phenyl-3-pyridazinone derivatives and drug composition containing the same
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United States of America Patent
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May 22, 2001
Grant Date -
N/A
app pub date -
Dec 11, 1998
filing date -
Jun 11, 1996
priority date (Note) -
Expired
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Abstract
A 5-phenyl-3-pyridazinone derivative having the formula (I) ##STR1## wherein R.sub.1 represents an unsubstituted or substituted C.sub.1 to C.sub.8 alkyl group, C.sub.3 to C.sub.7 cycloalkyl group, or indanyl group; R.sub.2 represents a C.sub.1 to C.sub.4 alkyl group; R.sub.3 represents a hydrogen atom or an unsubstituted or substituted C.sub.1 to C.sub.5 alkyl group; a C.sub.3 to C.sub.7 cycloalkyl group; or an aryl group which may contain a heteroatom; R.sub.4 and R.sub.5 independently represent a hydrogen atom, C.sub.1 to C.sub.6 alkyl group, an unsubstituted or substituted phenyl, or a monocyclic aryl group which may contain a heteroatom; a dotted line represents a single or double bond, provided that when the dotted line represents a single bond; R.sub.6 represents a hydrogen atom or C.sub.1 to C.sub.6 alkyl group.
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