Benzoheterocyclic compounds
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United States of America Patent
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Nov 20, 1990
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N/A
app pub date -
Oct 20, 1989
filing date -
Oct 20, 1988
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Expired
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Abstract
Novel 3-formyl-4-oxoquinoline compounds of the formula: ##STR1## wherein R.sup.1 is hydrogen atom or a lower alkanoyl, R.sup.2 is hydrogen atom or a lower alkyl, R.sup.3 is a lower alkyl, and X is halogen, and pharmaceutically acceptable salts thereof, said compounds having excellent antimicrobial activity and hence being useful as an antimicrobial agent, and a pharmaceutical composition containing said compound as an active ingredient.
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