Structure-activity Relationships within a Series of C(7)-Substitutedoxyiminocephalosporins Containing the C(3)-Methylaminopyridiniumthiomethyl Substituent. Synthesis and Biological Properties of BRL 57342 and Some Close Analogues.
作者:RICHARD G. ADAMS、EDWARD G. BRAIN、CLIVE L. BRANCH、ANGELA W. GUEST、FRANK P. HARRINGTON、LINDA MIZEN、JANE E. NEALE、MICHAEL J. PEARSON、IAIN N. SIMPSON、HAZEL SMULDERS、ISKANDER I. ZOMAYA
DOI:10.7164/antibiotics.48.417
日期:——
(6R, 7R)-7-[2-(2-Amino-4-thiazolyl)-2-[(Z)-[(S)-carboxy(3, 4-dihydroxyphenyl)methyl]oxyimino]acetamido]-3-(l-methylaminopyridinium-4-thiomethyl)ceph-3-em-4-carboxylate sodium salt (BRL 57342, 1f) combines excellent in vitro antibacterial potency against Gram-positive and Gram-negative bacteria, including P. aeruginosa and Acinetobacter spp., with excellent stability to extended spectrum β-lactamases. This potency is reflected in in vivo efficacy studies.
(6R,7R)-7-[2-(2-氨基-4-噻唑基)-2-[(Z)-[(S)-羧基(3,4-二羟基苯基)甲基]氧亚氨基]乙酰氨基]-3-(l-甲基氨基吡啶-4-硫甲基)头孢-3-em-4-甲酸钠盐(BRL 57342,1f)对革兰氏阳性菌和革兰氏阴性菌(包括铜绿假单胞菌和不动杆菌)具有极佳的体外抗菌效力。铜绿假单胞菌和不动杆菌属等革兰氏阳性和革兰氏阴性细菌的体外抗菌效力、对广谱β-内酰胺酶具有出色的稳定性。体内药效研究也反映了这种效力。