title: Two very unusual macrocyclic flavonoids from the water lily Nymphaea lotus.
abstract: Three novel flavonols, myricetin-3'-O-(6"-p-coumaroyl)glucoside and two epimeric macrocyclic derivatives, as well as the known myricetin-3-O-rhamnoside and pentagalloyl glucose, have been isolated from the wild water lily Nymphaea lotus L. and identified using 2D NMR. This is the first report of such a macrocycle from any source.
authors.affiliation: Department of Pharmaceutical Sciences, Strathclyde Institute for Biomedical Sciences, University of Strathclyde, 27 Taylor Street, Glasgow G4 0NR, UK.
authors.forename: Awatif A
authors.initials: AA
authors.lastname: Elegami
authors.forename: Catharine
authors.initials: C
authors.lastname: Bates
authors.forename: Alexander I
authors.initials: AI
authors.lastname: Gray
authors.forename: Simon P
authors.initials: SP
authors.lastname: Mackay
authors.forename: Graham G
authors.initials: GG
authors.lastname: Skellern
authors.forename: Roger D
authors.initials: RD
authors.lastname: Waigh
mesh_terms: D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D030721:Nymphaea / Q000737:chemistry*
chemical_list: D005419:Flavonoids