| 摘要 |
The invention provides antibacterial cephalosporin hydroxamic acid derivatives represented by the formula below, processes for their preparation, formulations containing the same as active ingredients, and a method for killing bacteria using the same: …<CHEM>… wherein R is hydrogen or acyl; R<1> is hydrogen or methoxy; R<2> is alkylene; R<3> is hydrogen, an aliphatic group or a hydroxy-protecting group; R<4> is hydrogen or an amino-protecting group; R<5> is hydrogen, a salt-forming group, e.g. a light metal atom or a carboxy-protecting group; and X is oxygen, sulfur, or sulfinyl. |
