A series of 6-nitro-5-deazaflavins bearing at N (3) or N (10) position the pyrrolecarboxamide (s) group as DNA minor groove binder has been synthesized. These hybrid molecules show similar redox properties to those of 6-nitro-5-deazaflavins with no pyrrolecarboxamide (s) group, suggesting that they generate stable one-and two-electron reduction product (s). Electrolytic reductions of the hybrid molecules were carried out at a controlled potential ...