title: Novel galactolipids from the leaves of Ipomoea batatas L.: characterization by liquid chromatography coupled with electrospray ionization-quadrupole time-of-flight tandem mass spectrometry.
abstract: Sixteen novel and ten known galactolipids have been isolated and characterized from the leaves of Ipomoea batatas L. (sweet potato) using an analytical method based on high-performance liquid chromatography coupled with electrospray ionization-quadrupole time-of-flight tandem mass spectrometry. Using this technique, the structures and regiochemistries of the fatty acyl groups and the positions of the double bonds on the acyl chains were determined. Sugar moieties were identified by analysis of one- and two-dimensional nuclear magnetic resonance spectra. The positions of the double bonds of polyunsaturated fatty acids were confirmed, and in some cases their geometries determined, by gas chromatography-mass spectrometry. This is the first report of galactolipids in the leaves of sweet potato.
authors.affiliation: Dipartimento di Scienze Farmaceutiche, Università degli Studi di Salerno, Via Ponte Don Melillo, 84084 Fisciano, Salerno, Italy.
authors.forename: Assunta
authors.initials: A
authors.lastname: Napolitano
authors.forename: Virginia
authors.initials: V
authors.lastname: Carbone
authors.forename: Paola
authors.initials: P
authors.lastname: Saggese
authors.forename: Kinya
authors.initials: K
authors.lastname: Takagaki
authors.forename: Cosimo
authors.initials: C
authors.lastname: Pizza
mesh_terms: D002851:Chromatography, High Pressure Liquid; D005227:Fatty Acids / Q000032:analysis; D038983:Galactolipids / Q000032:analysis* / Q000737:chemistry; D027723:Ipomoea batatas / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization; D053719:Tandem Mass Spectrometry
chemical_list: D005227:Fatty Acids; D038983:Galactolipids; C007388:digalactosyldiacylglycerol; C009909:monogalactosyldiacylglycerol