Novel penicillins

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The Toyama Chemical Co., Ltd. patent solves the following problem:

Our analysis of this patent is as follows:

Toyama Chemical Co., Ltd.’s patent US 4327097 A deals with Novel penicillins.
The new penicillins and cephalosporins and non-toxic salts thereof, consisting of a erop- or oxo- or thioxo-piperazino (thio) carbonylamino group ready. These compounds are valuable anti-bacterial compounds for use in mammals including humans. A process for the preparation of the compounds also discovered.

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