NCIt definition : The hydrobromide salt form of pibrozelesin, a semisynthetic water-soluble derivative
of the antineoplastic antibiotic duocarmycin B2, with antineoplastic activity. Activated
by carboxyl esterase, pibrozelesin alkylates DNA by binding to adenine-thymine (A-T)-rich
sequences in the minor groove of DNA, thereby inhibiting DNA replication and inducing
apoptosis.;