title: Characterization of flavonoid and naphthopyranone derivatives from Eriocaulon ligulatum using liquid chromatography tandem mass spectrometry.
abstract: Liquid chromatography-electrospray ionization multistage ion trap mass spectrometry (LC-ESI-IT-MS(n)) was used to analyze the secondary metabolites in the methanol extract of the capitulae of Eriocaulon ligulatum. The major components were mono- and diglycosides of flavonoids and naphthopyranones. Eleven compounds, including four new flavonol glycosides, were identified based on their fragmentation patterns in MS experiments and on NMR analysis of the isolated compounds. The described data may contribute to a better understanding of the taxonomic classification of the Eriocaulaceae family.
authors.affiliation: São Paulo State University-UNESP, Institute of Chemistry, Organic Chemistry Department, CP 355, CEP 14800-900, Araraquara, SP, Brazil. loursant@iq.unesp.br
authors.forename: Lourdes Campaner
authors.initials: LC
authors.lastname: dos Santos
authors.forename: Marcelo Aparecido
authors.initials: MA
authors.lastname: da Silva
authors.forename: Clenilson Martins
authors.initials: CM
authors.lastname: Rodrigues
authors.forename: Virginia
authors.initials: V
authors.lastname: Carbone
authors.forename: Assunta
authors.initials: A
authors.lastname: Napolitano
authors.forename: Carla
authors.initials: C
authors.lastname: Bassarello
authors.forename: Angela
authors.initials: A
authors.lastname: Mari
authors.forename: Sonia
authors.initials: S
authors.lastname: Piacente
authors.forename: Cosimo
authors.initials: C
authors.lastname: Pizza
authors.forename: Wagner
authors.initials: W
authors.lastname: Vilegas
mesh_terms: D002851:Chromatography, High Pressure Liquid; D002867:Chromones / Q000737:chemistry* / Q000302:isolation & purification; D039262:Eriocaulaceae / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D009281:Naphthalenes / Q000737:chemistry* / Q000302:isolation & purification; D021241:Spectrometry, Mass, Electrospray Ionization; D013056:Spectrophotometry, Ultraviolet; D053719:Tandem Mass Spectrometry
chemical_list: D002867:Chromones; D005419:Flavonoids; D009281:Naphthalenes