| 摘要 |
The penicillins of the formulae <IMAGE> Ia and <IMAGE> Ib in which R1 is phenyl, 2-thienyl, 3-thienyl, cyclohexyl, cyclohexen-1-yl, cyclohexa-1,4-dienyl, cyclohexa-1,4-dienylmethyl, 4-methoxycyclohexa-1,4-dienylmethyl or one of certain 4-substituted or 3,4-disubstituted phenyl moieties, and their pharmaceutically acceptable salts and physiologically hydrolyzed esters possess antibacterial activity and are particularly valuable in treating Pseudomonas infections.
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