title: LC/MS/MS characterization of phenolic constituents in dried plums.
abstract: Dried plums are known as a healthy food in the West and used as medicine in India. They have been characterized by high concentrations of phenolic compounds, which are believed to play a crucial role in protection against various age-related diseases. Liquid chromatography/mass spectrometry/mass spectrometry (LC/MS/MS) with four different conditions was used to analyze the phytochemicals in commercial dried plums. The major components were neochlorogenic acid and cryptochlorogenic acid. Forty minor components were characterized by their MS/MS spectra and LC retention time. Six of them are novel ester isomers formed by two caffeic acids and one quinic acid. The diagnostic fragmentation patterns of different phenolics are presented on the basis of electrospray ionization (ESI) MS/MS data of components in dried plums and fourteen authentic standards.
authors.affiliation: Arkansas Children's Nutrition Center, 1120 South Marshall Street, Little Rock, Arkansas 72202, USA.
authors.forename: Nianbai
authors.initials: N
authors.lastname: Fang
authors.forename: Shanggong
authors.initials: S
authors.lastname: Yu
authors.forename: Ronald L
authors.initials: RL
authors.lastname: Prior
mesh_terms: D002109:Caffeic Acids / Q000032:analysis / Q000737:chemistry; D002726:Chlorogenic Acid / Q000032:analysis; D002853:Chromatography, Liquid; D002934:Cinnamates / Q000032:analysis / Q000737:chemistry; D003373:Coumaric Acids / Q000032:analysis / Q000737:chemistry; D004952:Esters / Q000032:analysis / Q000737:chemistry; D005519:Food Preservation; D005638:Fruit / Q000737:chemistry*; D006027:Glycosides / Q000032:analysis; D013058:Mass Spectrometry; D010636:Phenols / Q000032:analysis*; D027861:Prunus / Q000737:chemistry*; D011801:Quinic Acid / Q000032:analysis / Q000737:chemistry; D012765:Shikimic Acid / Q000032:analysis / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D002109:Caffeic Acids; D002934:Cinnamates; D003373:Coumaric Acids; D004952:Esters; D006027:Glycosides; D010636:Phenols; D011801:Quinic Acid; C029010:cinnamic acid; D012765:Shikimic Acid; D002726:Chlorogenic Acid; C004999:ferulic acid; C040048:caffeic acid