7-Oxo-4-thia-1-azabicyclo(3,2,0)heptane derivatives
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United States of America Patent
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Jun 23, 1987
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N/A
app pub date -
Nov 18, 1985
filing date -
Mar 26, 1982
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Expired
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Abstract
Compounds of the formula Ia and their tautomers Ib ##STR1## in which formulae R represents a carboxyl esterifying group are described, as well as processes for their manufacture. Ia and Ib are valuable starting materials for the preparation of various derivatives substituted at position 3 that possess antibacterial properties.
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