title: Bioactive friedolanostanes and 11(10-->8)-abeolanostanes from the bark of Garcinia speciosa.
abstract: A new friedolanostane, 7, and three triterpenes, 8, 9a, and 10, possessing the new 11(10-->8)-abeolanostane carbon skeleton were isolated from the bark of Garcinia speciosa. Structures were elucidated by spectroscopic and spectrometric studies and the structure of 8 by X-ray crystallographic analysis, thus forcing structure revision of a triterpene from the same source previously assumed to be a friedolanostane. These and several friedo- and lanostanes earlier isolated from the same source were evaluated for cytotoxicity against three human cell lines. Most were moderately active, with three friedolanostanes effective in inducing apoptosis in the MCF-7 cell line.
authors.affiliation: ICBAS-Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, 4099-003 Porto, Portugal.
authors.forename: Luis M M
authors.initials: LM
authors.lastname: Vieira
authors.forename: Anake
authors.initials: A
authors.lastname: Kijjoa
authors.forename: Rujida
authors.initials: R
authors.lastname: Wilairat
authors.forename: Maria São José
authors.initials: MS
authors.lastname: Nascimento
authors.forename: Luis
authors.initials: L
authors.lastname: Gales
authors.forename: Ana Margarida
authors.initials: AM
authors.lastname: Damas
authors.forename: Artur M S
authors.initials: AM
authors.lastname: Silva
authors.forename: Ing-On
authors.initials: IO
authors.lastname: Mondranondra
authors.forename: Werner
authors.initials: W
authors.lastname: Herz
mesh_terms: D017209:Apoptosis / Q000187:drug effects; D018360:Crystallography, X-Ray; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D007810:Lanosterol / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D008968:Molecular Conformation; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D024301:Plant Bark / Q000737:chemistry; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D014407:Tumor Cells, Cultured
chemical_list: D014315:Triterpenes; D007810:Lanosterol