Synthesis and biological activity of tetracyclic carbapenems

Synthesis and biological activity of tetracyclic carbapenems Synthesis and biological properties of new 1β-methylcarbapenems having tetrazolothioether moiety Synthesis and structure-activity relationships of novel THF 1β-methylcarbapenems Synthesis and biological evaluation of novel 1β-methylcarbapenems having a new moiety at C-2 Orally active esters of cephalosporin antibiotics. Synthesis and biological properties of acyloxymethyl esters of 7-(D-2-amino-2-phenylacetamido)-3-[5-methyl-(1,3,4-thiadiazol-2-yl)thiomethyl]-3-cephem-4-carboxylic acid Synthesis and biological activity of novel 1β-Methylcarbapenems with oxyiminopyrrolidinylamide moiety Synthesis and biological properties of new 1β-methylcarbapenems containing heteroaromatic thioether moiety Mono and bis double ester prodrugs of novel aminomethyl-THF 1β-methylcarbapenems Synthesis and biological activity of 1β-methyl-2-[5′-isoxazoloethenylpyrrolidin-3′-ylthio]carbapenems Studies on β-lactam antibiotics. Synthesis and antibacterial activity of novel 1β-methylcarbapenems related to FR21818: 5-membered ring analogs