A benzimidazole antifilarial agent; it is fluorescent when it binds to certain nucleotides in DNA, thus providing a tool for the study of DNA replication; it also interferes with mitosis.

Synonyms: 23491-45-4, Hoe-33258, Pibenzimol, NSC-322921, NSC 322921, Bisbenzimidazole, Bisbenzimidazole Trihydrochloride, Hoe 33258, 4-(5-(5-(4-Methylpiperazin-1-yl)benzimidazol-2- yl)benzimidazol-2-yl)phenol, 0, Bisbenzimide, Hoechst 33258, LHQ7J5KV9B, 4-(5-(4-Methyl-1-piperazinyl)(2,5'-bi-1H-benzimidazol)-2'-yl)phenol, trihydrochloride, NSC322921, Hoe33258