COMPOUNDS

摘要

Novel Compounds Compounds of the general formula (II): and pharmaceutically acceptable salts and in-vivo hydrolysable esters thereof, in which R denotes a hydrogen atom or an in vivo hydrolysable acyl group; and the wavy line denotes either the E- or Z-isomeric position, are novel compounds which exhibit .beta.-lactamase inhibitory action and have antibacterial properties.