title: Isolation and structure elucidation of phenolic compounds from longan (Dimocarpus longan Lour.) seed by high-performance liquid chromatography-electrospray ionization mass spectrometry.
abstract: High-performance liquid chromatography coupled with electrospray ionization mass spectrometry (HPLC-ESI-MS) analysis revealed the phenolics profile of longan (Dimocarpus longan Lour.) seed. Gallic acid, ellagic acid, monogalloyl-glucose, monogalloyl-diglucose, digalloyl-diglucose, penta- to heptagalloyl-glucose, ellagic acid-pentose conjugate, galloyl-HHDP (Hexahydroxydiphenoyl)-glucopyranose, pentagalloy-HHDP-glucopyranose, procyanidin A-type dimer, procyanidin B2 and quercetin-3-O-rhamnoside were found to be present in longan seed along with a number of, as yet, unknown compounds. The results illustrate the rich array of phenolic compounds in longan seeds which could be utilized as health-beneficial bioactive compounds rather than just discarded as waste.
authors.affiliation: Food Science and Technology Programme, Department of Chemistry, National University of Singapore, Singapore 117543, Singapore. scip1160@nus.edu.sg
authors.forename: Yean Yean
authors.initials: YY
authors.lastname: Soong
authors.forename: Philip John
authors.initials: PJ
authors.lastname: Barlow
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D003911:Dextrans; D015394:Molecular Structure; D019800:Phenol / Q000737:chemistry / Q000302:isolation & purification*; D029631:Sapindaceae / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: D003911:Dextrans; D019800:Phenol; C025614:sephadex