Cephalosporin derivatives

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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424246, C07D50124

Patent

active

040071766

ABSTRACT:
New cephalosporin derivatives of the formula: ##STR1## wherein one of A and A.sub.1 represents oxygen or sulphur and the other represents sulphur, R.sub.1 represents hydrogen, acetoxy, (5-methyl-1,3,4-thiadiazol-2-yl)thio or (1-methyl-1,2,3,4-tetrazol-5-yl)thio and R.sub.2 represents carboxy, or R.sub.1 represents a pyridinio radical and R.sub.2 represents the carboxylate ion, are therapeutically useful compounds possessing antibacterial properties.

REFERENCES:
patent: 3516997 (1970-06-01), Takano et al.
patent: 3692779 (1972-09-01), Huldrege
patent: 3886151 (1975-05-01), Wei

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