abstract |
A cephalosporin derivative represented by the general formula:n where R 1 is a hydrogen atom, a lower alkanoyl group or a lower alkoxycarbonyl group, R 2 is a hydrogen atom or a methoxy group, R 3 is-CH 2 OCOCH 3 or-n and n is an integer of 1, 2 or 3, or a pharmaceutically acceptable salt thereof. |