| 摘要 |
Antibacterially active cephalosporins of the formula <IMAGE> in which R1 denotes C1-C6-alkyl, phenyl or halogen-substituted phenyl, and R2 and R3, which can be identical or different, denote H, C1-C4-alkyl, chlorine, bromine, carbamoyl or N-C1-C4-alkylcarbamoyl.
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