Antibacterial agents

Abstract

The penicillins of the formulae ##STR1## in which R.sup.1 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.

Dependencies are inferred from the claim text.