| 摘要 |
Compounds of the formula <IMAGE> (I) in which R1 represents lower alkyl substituted by hydroxy or by protected hydroxy, R2 represents carboxy or functionally modified carboxy, and R3 represents optionally substituted 3-pyridyl or optionally substituted 4-pyridyl, and pharmaceutically acceptable salts of such compounds, have antibacterial activity. The compounds of the formula I can be manufactured according to processes known per se. |
