Toyama Chemical Co., Ltd.

Miwako Komatsu

Isamu Saikawa

Shuntaro Takano

Takashi Yasuda

Kaishu Momonoi

Yutaka Kodama

Seietsu Kuroda

Okuta Takashima

Chosaku Yoshida

Kyoko Kasuya

Novel penicillins and cephalosporins and non-toxic salts thereof, which contain a mono- or di-oxo- or thioxo-piperazino(thio)carbonylamino group in molecule. These compounds are valuable antibacterial compounds for use in mammals including man. This disclosure relates to such compounds and a process for the preparation thereof.

Cephalosporins

Novel penicillins and cephalosporins and non-toxic salts thereof, which contain a mono- or di-oxo- or thioxo-piperazino(thio)carbonylamino group have been prepared. These compounds are valuable anti-bacterial compounds for use in mammals including man. A process for the preparation of the compounds has also been discovered.

Novel penicillins

Novel penicillins and non-toxic salts thereof, which contain a mono- or di-oxo- or thioxo-piperazino(thio)carbonylamino group have been prepared. These compounds are valuable antibacterial compounds for use in mammals including man. A process for the preparation of the compounds has also been discovered.

Novel penicillins and cephalosporins and process for producing same

Novel penicillins and cephalosporins and non-toxic salts thereof, which contain a mono- or di-oxo- or thioxo-piperazino(thio)carbonylamino group have been prepared. These compounds are valuable antibacterial compounds for use in mammals including man. A process for the preparation of the compounds has also been discovered.

Novel penicillins and cephalosporins and process for producing the same

2,3 Diketo-piperazinocarbonylamino alkanoic acids and derivatives

Novel bis-type penicillins containing a (thio)acylureido group in the molecule, which are valuable antibacterial compounds for use in mammals including a human being. This disclosure relates to such compounds and a process for the preparation thereof.

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Toyama, Japan

Miwako Komatsu