1. New concepts in the field of cephalosporins: C-3' quaternary ammonium cephems (Group IV) 
André Bryskier 
Clinical Microbiology and Infection 
Volume 3, Pages S1-S6 (April 1997)
DOI: /j tb00642.x
Copyright © 1997 European Society of Clinical Infectious Diseases Terms and Conditions

2. Figure 1 Structure of C-3' quaternary ammonium cephems
Clinical Microbiology and Infection 1997 3, S1-S6DOI: ( /j tb00642.x)
Copyright © 1997 European Society of Clinical Infectious Diseases Terms and Conditions

3. Figure 2 Structure of dianionic and zwitterionic cephalosporins
Clinical Microbiology and Infection 1997 3, S1-S6DOI: ( /j tb00642.x)
Copyright © 1997 European Society of Clinical Infectious Diseases Terms and Conditions

4. Figure 3 Structure of C-3' and C-7 quaternary ammonium cephems.
Clinical Microbiology and Infection 1997 3, S1-S6DOI: ( /j tb00642.x)
Copyright © 1997 European Society of Clinical Infectious Diseases Terms and Conditions

5. Figure 4
Activity of C-3' quaternary ammonium cephems against P. aeruginosa. From Le Noc et al. 18.
Clinical Microbiology and Infection 1997 3, S1-S6DOI: ( /j tb00642.x)
Copyright © 1997 European Society of Clinical Infectious Diseases Terms and Conditions

6. Figure 5
Activity of C-3' quaternary ammonium cephems against S. pneumoniae. From Frémaux et al. 19.
Clinical Microbiology and Infection 1997 3, S1-S6DOI: ( /j tb00642.x)
Copyright © 1997 European Society of Clinical Infectious Diseases Terms and Conditions

7. Figure 6
Activity of C-3' quaternary ammonium cephems against S. aureus. From Le Noc et al. 18.
Clinical Microbiology and Infection 1997 3, S1-S6DOI: ( /j tb00642.x)
Copyright © 1997 European Society of Clinical Infectious Diseases Terms and Conditions