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US4507239A Penicillin derivatives and process for preparation 失效
青霉素衍生物及其制备方法

Penicillin derivatives and process for preparation
摘要:
A penicillin derivative represented by the following formula, a pharmaceutically acceptable salt thereof and an ester thereof: ##STR1## wherein n is 0, 1 or 2 and process for preparing the same.
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