title: Venuloxanthone, a new pyranoxanthone from the stem bark of Calophyllum venulosum.
abstract: A new pyranoxanthone, venuloxanthone (1), was isolated from the stem bark of Calophyllum venulosum, together with three other xanthones, tovopyrifolin C (2), ananixanthone (3) and caloxanthone I (4), along with two common triterpenes, friedelin (5) and lupeol (6). The structures of these compounds were identified using several spectroscopic analyses which are NMR, GCMS and FTIR experiments.
authors.affiliation: a Chemistry Department , Faculty of Science, Universiti Putra Malaysia , Serdang 43400 , Selangor , Malaysia.
authors.forename: Ahmad Azri Fitri
authors.initials: AA
authors.lastname: Bin Ismail
authors.affiliation: a Chemistry Department , Faculty of Science, Universiti Putra Malaysia , Serdang 43400 , Selangor , Malaysia.
authors.forename: Gwendoline Cheng Lian
authors.initials: GC
authors.lastname: Ee
authors.affiliation: a Chemistry Department , Faculty of Science, Universiti Putra Malaysia , Serdang 43400 , Selangor , Malaysia.|b Chemistry Department , Faculty of Applied Science, Universiti Teknologi MARA , Jengka 26400 , Pahang , Malaysia.
authors.forename: Shaari
authors.initials: S
authors.lastname: Bin Daud
authors.affiliation: a Chemistry Department , Faculty of Science, Universiti Putra Malaysia , Serdang 43400 , Selangor , Malaysia.
authors.forename: Soek Sin
authors.initials: SS
authors.lastname: Teh
authors.affiliation: c Department of Pharmacy , Faculty of Medicine, University of Malaya , Kuala Lumpur , Malaysia.
authors.forename: Najihah Mohd
authors.initials: NM
authors.lastname: Hashim
authors.affiliation: d Department of Chemistry , Faculty of Science, University of Malaya , Kuala Lumpur , Malaysia.
authors.forename: Khalijah
authors.initials: K
authors.lastname: Awang
mesh_terms: D029759:Calophyllum / Q000737:chemistry*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D024301:Plant Bark / Q000737:chemistry; D011714:Pyrans / Q000737:chemistry / Q000302:isolation & purification*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*; D044004:Xanthones / Q000737:chemistry / Q000302:isolation & purification*; D000094042:Lupanes
chemical_list: D011714:Pyrans; D014315:Triterpenes; D044004:Xanthones; C000605696:venuloxanthone; C060796:friedelin; D000094042:Lupanes
keywords: Calophyllum venulosum; Clusiaceae; pyranoxanthone; venuloxanthone