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NCI Drug Dictionary


A fluorescent dye of benzimidazole derivative. Pibenzimol binds to AT-specific sites in the minor groove of duplex DNA and inhibits topoisomerase I, and DNA polymerase, thereby preventing DNA replication. This agent prolongs the G2 phase of the cell cycle and initiates apoptosis in tumor cells. Check for active clinical trials or closed clinical trials using this agent. (NCI Thesaurus)
Hoechst dye 33258
pibenzimol hydrochloride
Code names:HOE 33258
Hoechst 33258
Chemical structures:phenol, 4-(5-(4-methyl-1-piperazinyl)(2,5'-bi-1H-benzimidazol)-2'-yl)-, trihydrochloride
phenol, p-[5-[5-(4-methyl-1-piperazinyl)-2-benzimidazolyl]-2- benzimidazolyl]-, trihydrochloride