Pibrozelesin Hydrobromide

**Semantic type:** Pharmacologic Substance

**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.

**Synonyms:** - PIBROZELESIN HYDROBROMIDE