摘要 |
<p>A compound of the formula; <IMAGE> wherein R0 stands for nitrogen-containing heterocyclic group, acyl group or amino-protecting group, Z stands for S, S->O, O or CH2, R4 stands for hydrogen atom, methoxy group or formamido group, R13 stands for hydrogen atom, methyl group, hydroxyl group or halogen atom and A stands for an optionally substituted thiazol-3-yl group forming a fused ring at the 4,5-position or a physiologically or pharmaceutically acceptable salt or ester thereof. This compound is novel and has excellent antibacterial activity.</p> |