| 摘要 |
The present invention relates to carbapenems and provides a compound of the formula (I) <IMAGE> (I) wherein: R1 is 1-hydroxyethyl, 1-fluoroethyl or hydroxymethyl; R2 is hydrogen or C1-4alkyl; R3 is hydrogen or C1-4alkyl; and the pyridyl group is bonded to the nitrogen of the linking carbamoyl group by a carbon atom, is substituted with the carboxy group on a carbon atom and is optionally substituted on one or two pyridyl ring carbon atoms; or a pharmaceutically acceptable salt or in vivo hydrolyzable ester thereof. Processes for their preparation, intermediates in their preparation, their use as therapeutic agents and pharmaceutical compositions containing them.
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