title: Minor betalains in fruits of Hylocereus species.
abstract: Betacyanins in peel and flesh of fruits of different Hylocereus species were identified by means of GC/MS, electrospray MS/MS, HPLC as well as (1)H and (13)C NMR techniques. As hitherto unknown pigments: betanidin 5-O-(2'-O-beta-D-apiofuranosyl)-beta-D-glucopyranoside, betanidin 5-O-(4'-O-malonyl)-beta-D-glucopyranoside and betanidin 5-O-[(5''-O-E-sinapoyl)-2'-O-beta-D-apiofuranosyl]-beta-D-glucopyranoside were elucidated. The sinapoyl moiety attachment position in the structure of betacyanins was established for the first time. The peel contained a more complex pattern of betacyanins with apiofuranosyl moiety. Other recently identified pigments were also present in the samples and their (1)H or (13)C NMR spectra were recorded. In the case of phyllocactin and its 4'-isomer the migration of the malonyl group was noticed.
authors.affiliation: Department of Chemical Engineering and Technology, Institute C-1, Faculty of Analytical Chemistry, Cracow University of Technology, ul. Warszawska 24, 31-155 Cracow, Poland. swybran@chemia.pk.edu.pl
authors.forename: Sławomir
authors.initials: S
authors.lastname: Wybraniec
authors.forename: Barbara
authors.initials: B
authors.lastname: Nowak-Wydra
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Mitka
authors.forename: Piotr
authors.initials: P
authors.lastname: Kowalski
authors.forename: Yosef
authors.initials: Y
authors.lastname: Mizrahi
mesh_terms: D050858:Betalains / Q000032:analysis* / Q000737:chemistry*; D029421:Cactaceae / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D005638:Fruit / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy
chemical_list: D050858:Betalains