title: Polyphenolic constituents of Callistemon lanceolatus leaves.
abstract: Two new flavonol glycosides, kaempferol 3-O-beta-D-galacturonopyranoside and quercetin 3-O-(2"-O-galloyl)-beta-D-glucoronopyranoside, were isolated, from leaves of Callistemon lanceolatus DC, as well as eighteen known polyphenols (phenolic acids, flavonoids and three tannins). All structures were established mainly on the basis of chemical and spectroscopic analysis (UV, 1D NMR and negative ESI-MS) and finally confirmed by 2D NMR experiments (HMQC and HMBC), in the case of flavonoid glycosides and tannins.
authors.affiliation: Pharmacognosy Department, Faculty of Pharmacy, Helwan University, Helwan, Cairo, Egypt.
authors.forename: I I
authors.initials: II
authors.lastname: Mahmoud
authors.forename: F A
authors.initials: FA
authors.lastname: Moharram
authors.forename: M S A
authors.initials: MS
authors.lastname: Marzouk
authors.forename: M W
authors.initials: MW
authors.lastname: Linscheid
authors.forename: M I
authors.initials: MI
authors.lastname: Saleh
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D027822:Myrtaceae / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D010636:Phenols; D010936:Plant Extracts