2-lower alkyl-2 or 3-cephem-4-carboxylic acid derivatives...

Details 2-lower alkyl-2 or 3-cephem-4-carboxylic acid derivatives... 2-lower alkyl-2 or 3-cephem-4-carboxylic acid derivatives...

C - Chemistry, Metallurgy

07

D

260/101.5

C07D 501/02 (2006.01) C07D 501/14 (2006.01)

Patent

CA 1043773

ABSTRACT OF THE DISCLOSURE Novel 2-lower alkyl 2(or 3)-cephem-4-carboxylic acid derivatives and their process of preparation are provided of formula Image wherein R1 is amino or a substitued amino, R2 is carboxy or a protected carboxy, R3 is lower alkyl and X is -S- or -?-, or pharmaceutically acceptable salts; the derivatives have anti- microbial activity.

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