| 摘要 |
<p>Antibacterial cephalosporin compounds of the following formula: <IMAGE> wherein A and B each is a hydrogen, organic or inorganic acyl, or A and B combined together are a diacyl group derived from a polybasic acid; Y is a hydrogen or methoxy; R is a hydrogen or lower alkyl; R' is a hydrogen, alkali metal, organic base group or easily removable protecting group; m is 0 or 1; Z is an optionally substituted guanylhydrazono group, preparable from the corresponding oxo compound or its reactive derivative by reacting with a guanylhyrazine of the formula H2Z or its reactive derivative, or by some other reactions.</p> |
