| 摘要 |
<p>Certain cephalosporin compounds having the formula <CHEM> or a pharmaceutically-acceptable salt or in vivo hydrolysable ester thereof wherein R<1> is C1-C6 alkyl substituted by a carboxyl, cyano, halo, hydroxyl or protected carboxyl group; and (A) X is hydrogen or halo and Y is halo, or (B) X is hydrogen and Y is nitro. and their pharmaceutically- acceptable salts or in vivo hydrolyzable esters are useful as antibacterial agents.</p> |
