A new series of 7-acylamino-8-oxo-3-oxa-1-azabicyclo-[4.2.0]octane-2-carboxylic acid derivatives is described which compounds have antibacterial activity especially against certain Gram negative organisms.
                            描述了一系列新的7-酰胺基-8-酮基-3-氧杂-1-氮杂
双环[4.2.0]辛烷-2-
羧酸衍
生物,这些化合物具有抗细菌活性,特别针对某些革兰氏阴性微
生物。