title: First isolation of a symmetrical glycosylated methylene bisflavonoid.
abstract: Blutaparon portulacoides (St. Hil.) Mears (= Philoxerus portulacoides St. Hil.) (Amaranthaceae) is a species occurring in the Brazilian coast in two botanical varieties. The chemical study of an ethanolic extract led to the isolation of spinacetin 3- O-robinobioside as well as an unique glycosylated pseudo-dimeric flavonoid identified as 8,8""-methylene bis(spinacetin 3- O-robinobioside) mainly by NMR analyses (1H, 1H- 1H COSY, 13C, HMQC, HMBC) and MALDI-TOF mass spectrometry.
authors.forename: Daniela B
authors.initials: DB
authors.lastname: De Oliveira
authors.forename: Ana Paula
authors.initials: AP
authors.lastname: de Almeida
authors.forename: Gabriela L
authors.initials: GL
authors.lastname: De B  A  Simões
authors.forename: Catherine
authors.initials: C
authors.lastname: Auvin
authors.forename: Carlos R
authors.initials: CR
authors.lastname: Kaiser
authors.forename: Sônia S
authors.initials: SS
authors.lastname: Costa
mesh_terms: D027703:Amaranthaceae; D005419:Flavonoids / Q000737:chemistry*; D006031:Glycosylation; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008517:Phytotherapy; D010936:Plant Extracts / Q000737:chemistry*
chemical_list: D005419:Flavonoids; D010936:Plant Extracts