发明授权
US4260607A Cephalosporin esters 失效
头孢菌素酯

Cephalosporin esters
摘要:
A cephalosporin derivative of the formula: ##STR1## wherein R represents ##STR2## or its pharmaceutically acceptable acid addition salt is found to be useful as orally administrable antibiotics having broad anti-microbial activities against both Gram-positive and Gram-negative bacteria.
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