title: 13C NMR spectroscopy of some third-generation cephalosporins, their synthetic intermediaries and reaction byproducts.
abstract: (13)C NMR spectroscopic data for 25 cephalosporin derivatives were assigned by combination of one- and two-dimensional experiments. The effect of the substitution at C-3, C-7 and C-4 acid group positions on the chemical shifts of the cephem nucleus is discussed.
authors.affiliation: Centro de Química Farmacéutica, Avenida 200 y 21, Siboney, Playa, CP 16042, Ciudad de La Habana, Cuba.
authors.forename: Miguel A
authors.initials: MA
authors.lastname: López
authors.forename: Zalua
authors.initials: Z
authors.lastname: Rodríguez
authors.forename: Maritza
authors.initials: M
authors.lastname: González
authors.forename: Blanca
authors.initials: B
authors.lastname: Tolón
authors.forename: Rizette
authors.initials: R
authors.lastname: Avila
authors.forename: Juan C
authors.initials: JC
authors.lastname: Rodríguez
authors.forename: Hermán
authors.initials: H
authors.lastname: Vélez-Castro
authors.forename: Adamo
authors.initials: A
authors.lastname: Fini
mesh_terms: D002247:Carbon Isotopes; D002511:Cephalosporins / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods* / Q000592:standards; D015394:Molecular Structure; D012015:Reference Standards; D012680:Sensitivity and Specificity
chemical_list: D002247:Carbon Isotopes; D002511:Cephalosporins