Q. Sun et al., STRUCTURE-ACTIVITY OF TOPOISOMERASE-I POISONS RELATED TO HOECHST-33342, Bioorganic & medicinal chemistry letters, 4(24), 1994, pp. 2871-2876
A series of bisbenzimidazoles related to Hoechst 33342 were synthesize
d. Data on the relative activity of these bisbenzimidazoles as topoiso
merase I poisons suggest that considerable flexibility exists in the l
ocation of the tertiary alkylamine moiety. With the exception of aryla
mine analogs, cytotoxicity was generally consistent with their relativ
e potency as topoisomerase I poisons.