| 摘要 |
<p>New cephalosporin antibiotics are provided. The compounds have the general formula (I) , wherein R is a hydrogen atom, an esterified carboxy or carboxy group, and Y is a lower alkanoyl, lower alkoxy or azido or a group of the formula-SR3 in which R3 is a heteroxyclic residue. They are prepared by acylation of a suitable 7-aminocephalosporanic acid derivative.</p> |
