Cephalosporin derivatives with 2- and 4-pyridone groups at carbon-3

Cephalosporin derivatives with 2- and 4-pyridone groups at carbon-3 Structure-activity relations in cephalosporins prepared from penicillins. 2. Analogs of cephalexin substituted in the 3-methyl group Synthesis and biological activity of a novel class of cephalosporins with a oxadiazolyl hydroxypyridone moiety at C-7 Synthesis and Biological Evaluation of a Series of New Parenteral Optically Active 3-[[(N-Alkylpyridinium-4'-yl)thio]methyl]-2-oxaisocephems Synthesis and biological evaluation of a series of parenteral 3'-quaternary ammonium cephalosporins Orally absorbable cephalosporin antibiotics. 2. Structure-activity studies of bicyclic glycine derivatives of 7-aminodeacetoxycephalosporanic acid Oral absorption of cephalosproin antibiotics 2. Expanded structure-activity relationships of 7-arylacetamido-3-substituted cephalosporins Semisynthetic cephalosporins. Synthesis and structure-activity relationships of 7-(1-pyrryl)- and 7-(1-indolyl)acetamidocephalosporin derivatives Orally active cephalosporins and penicillins Orally absorbable cephalosporin antibiotics. 1. Structure-activity relationships of benzothienyl- and naphthylglycine derivatives of 7-aminodeacetoxycephalosporanic acid