Semisynthetic penicillins and cephalosporins containing the substituted 6-vinyl-1,2-dihydro-2-oxo- and 1,4-dihydro-4-oxo-3-pyridinecarboxylic acid side chains. Synthesis and structure-activity relationshipsDEJOHN, D; DOMAGALA, J. M; HASKELL, T. H et al.Journal of antibiotics (Tokyo. 1968). 1985, Vol 38, Num 3, pp 372-379, issn 0021-8820Article

CI-867, A NEW BROAD-SPECTRUM SEMISYNTHETIC PENICILLINKALTENBRONN JS; HASKELL TH; DOUB L et al.1979; J. ANTIBIOT.; JPN; DA. 1979; VOL. 32; NO 6; PP. 621-625; BIBL. 6 REF.Article