发明授权
US4260625A Penicillins 失效
青霉素

Penicillins
摘要:
A class of penicillins with antibacterial activity having formula (I): ##STR1## wherein R.sup.2 is hydrogen or a pharmaceutically acceptable salting ion or in vivo hydrolyzable ester radical and R.sup.1 is hydrogen, a pharmaceutically acceptable salting ion or a pharmaceutically acceptable ester forming radical.
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