| 摘要 |
<p>An antibacterial 7beta-substituted malonamido-7alpha-methoxy-3-tetrazolylthiomethyl-1-dethia-1-oxa-3-ceph em-4-carboxylic acid and its derivative represented by the following formula: <IMAGE> (wherein R1 is alkyl, hydroxyaryl, or thienyl; R2 and R4 each is hydrogen, light metal or a carboxy-protecting group; and R3 is optionally protected hydroxyalkyl, carbamoylalkyl, dialkylaminoalkyl, or sulfamoylalkyl) are disclosed.</p> |
