4-oxoquinolizine antimicrobial having 2-pyridone skeleton as partial structure
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United States of America Patent
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Feb 25, 2003
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app pub date -
Apr 18, 2002
filing date -
Oct 19, 1999
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Abstract
A compound represented by the following Formula (I) or a pharmaceutically acceptable salt thereof: ##STR1## wherein R.sub.1 represents a hydrogen atom or a carboxyl-protecting group, R.sub.2 represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group or a hydroxyl group, R.sub.3 represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, a lower alkylthio group, a nitro group, a cyano group, a hydroxyl group or an amino group; R.sub.4 represents a hydrogen atom, an amino-protecting group, an alkyl group or a cycloalkyl group, and R.sub.5 represents a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an alkoxy group, an alkylthio group, a hydroxyl group, an imino group or an amino group.
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