title: Cytotoxic geranyl stilbenes from Macaranga schweinfurthii.
abstract: Three novel geranyl stilbenes, schweinfurthins A, B, and C (1, 2, and 3), were isolated from the Cameroonian plant Macaranga schweinfurthii (Euphorbiaceae) and their structures determined by NMR and mass spectral methods. The cytotoxicity profile of the schweinfurthins tested in the NCI 60-cell screen was similar to that of the stelletins and cephalostatins, suggesting that these structurally diverse natural products may share similar mechanisms of cytotoxicity.
authors.affiliation: Laboratory of Drug Discovery Research and Development, Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute-Frederick Cancer Research and Development Center, Frederick, Maryland 21702-1201, USA.
authors.forename: J A
authors.initials: JA
authors.lastname: Beutler
authors.forename: R H
authors.initials: RH
authors.lastname: Shoemaker
authors.forename: T
authors.initials: T
authors.lastname: Johnson
authors.forename: M R
authors.initials: MR
authors.lastname: Boyd
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D002163:Cameroon; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013056:Spectrophotometry, Ultraviolet; D013267:Stilbenes / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D014407:Tumor Cells, Cultured
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D013267:Stilbenes; C117232:schweinfurthin; C117233:schweinfurthin B; C117234:schweinfurthin C