| abstract |
There is provided a cephalosporin derivative represented by the general formula (1): ##STR1## wherein R 101 , R 102 , R 103 and Y 101 are as difined; the general formula (2): ##STR2## wherein R 201 , R 202 and R 203 are as defined above; the general formula (3): ##STR3## wherein R 301 , R 302 , Y 301 , Y 302 and A 301 are as defined; or pharmaceutically acceptable salt thereof. The compound is useful as an active ingredient of antimicrobial agent. |