| 摘要 |
The novel cephalosporin compounds correspond to the formula: <IMAGE> In the formula I, R<1>, R<2>, R<3>, R<4> and R<5> have the meanings given in Patent Claim 1. The compounds of the formula I, or their salts, can be processed, together with pharmaceutically harmless, non-toxic carrier substances, to give drugs possessing an antibacterial effect.
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