This invention relates to penicillanic acid derivatives of the formula I ##STR1## in which X stands for chlorine, bromine or iodine, to pharmaceutically acceptable, non-toxic salts of the compounds of formula I, to pharmaceutically acceptable, easily hydrolyzable esters thereof, including salts of such esters, to pharmaceutical compositions containing the compounds of the invention and dosage units thereof, to methods for the preparation of the compounds of the invention, and to methods of using the said new compounds in the human and veterinary therapy. The 6.beta.-halopenicillanic acids of formula I are potent inhibitors of .beta.-lactamases from a variety of gram-positive and gram-negative bacteria, making the 6.beta.-halopenicillanic acids as well as their salts and easily hydrolyzable esters valuable in human and veterinary medicine.
本发明涉及公式I的青霉烷酸衍
生物,其中X代表
氯、
溴或
碘,以及该公式I化合物的药学上可接受的、无毒的盐,其易
水解的药学上可接受的酯,包括这种酯的盐,含有本发明化合物和剂量单位的制药组合物,制备本发明化合物的方法,以及在人类和兽医治疗中使用这些新化合物的方法。公式I的6β-卤代青霉烷酸是各种革兰氏阳性和阴性细菌β-内酰胺酶的强效
抑制剂,使得6β-卤代青霉烷酸及其盐和易
水解的酯在人类和兽医学中具有重要价值。