title: Lupane triterpenoids from Acacia mellifera with cytotoxic activity.
abstract: Three new pentacyclic triterpenoids: (20R)-3-oxolupan-30-al (1), (20S)-3-oxolupan-30-al (2) and (20R)-28-hydroxylupen-30-al-3-one (3), along with (20S)-3beta-hydroxylupan-30-al (4), the latter previously described as a constituent of an epimeric mixture, were isolated from Acacia mellifera. In addition, the known metabolites 30-hydroxylup-20-(29)-en-3-one (5), 30-hydroxylup-20-(29)-en-3beta-ol (6), atranorin, methyl 2,4-dihydroxy-3,6 dimethyl benzoate, sitosterol-3beta-O-glucoside and linoleic acid were found in the analyzed plant species for the first time. The structures of the new metabolites were elucidated by extensive spectroscopic analyses and their relative stereochemistry was determined by NOESY experiments. The new metabolite 3 exhibited significant cytotoxic activity against the NSCLC-N6 cell line, derived from a human non-small-cell bronchopulmonary carcinoma.
authors.affiliation: University of Athens, Department of Pharmacy, Division of Pharmacognosy and Chemistry of Natural Products, Panepistimiopolis Zografou, Athens 157 71, Greece. CMutai@kemri.org
authors.forename: Charles
authors.initials: C
authors.lastname: Mutai
authors.forename: Dennis
authors.initials: D
authors.lastname: Abatis
authors.forename: Constantinos
authors.initials: C
authors.lastname: Vagias
authors.forename: Dimitri
authors.initials: D
authors.lastname: Moreau
authors.forename: Christos
authors.initials: C
authors.lastname: Roussakis
authors.forename: Vassilios
authors.initials: V
authors.lastname: Roussis
mesh_terms: D000045:Acacia / Q000737:chemistry*; D000970:Antineoplastic Agents / Q000302:isolation & purification* / Q000494:pharmacology; D002289:Carcinoma, Non-Small-Cell Lung / Q000473:pathology; D045744:Cell Line, Tumor; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology; D009682:Magnetic Resonance Spectroscopy; D014315:Triterpenes / Q000302:isolation & purification* / Q000494:pharmacology; D053978:Pentacyclic Triterpenes
chemical_list: D000970:Antineoplastic Agents; D014315:Triterpenes; C480546:lupane; D053978:Pentacyclic Triterpenes