title: A secondary metabolite amberin from Amberboa ramosa.
abstract: Amberin (1), a new sesquiterpene lactone, has been isolated from the ethyl acetate soluble fraction of Amberboa ramosa together with apigenin (2), jaseocidine (3), crysoeriol (4), and 3β, 8α-dihydroxy-11α-methyl-1αH, 5αH, 6βH, 7αH, 11βH-guai-10(14), 4 (15)-dien-6, 12-olide (5). The structures of the isolated compounds have been elucidated by 1D and 2D NMR spectroscopy.
authors.affiliation: Department of Chemistry, University of Karachi, Karachi, 75270, Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Ibrahim
authors.forename: Muhammad
authors.initials: M
authors.lastname: Imran
authors.forename: Bakhat
authors.initials: B
authors.lastname: Ali
authors.forename: Riaz
authors.initials: R
authors.lastname: Hussain
authors.forename: Fouzia Sultana
authors.initials: FS
authors.lastname: Rehmani
authors.forename: Abdul
authors.initials: A
authors.lastname: Malik
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D007783:Lactones / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010154:Pakistan; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D007783:Lactones; D012717:Sesquiterpenes; C571134:amberin