| 摘要 |
The present invention provides the compounds of the formula (II): <IMAGE> (II) and salts and esters thereof wherein R3 is a hydrogen atom or is an organic bonded via a carbon atom to the carbapenem ring, n is zero or one, X is a saturated or unsaturated hydrocarbon radical optionally substituted by bromo or chloro, and R4 is a C1-6 alkyl, C2-6 alkenyl, C1-10 aralkyl or aryl group, any of such groups R4 being optionally substituted. These compounds are useful as antibacterial agents. |
