title: A new dihydrodibenzodioxinone from Hypericum x 'Hidcote'.
abstract: One new compound, 4-hydroxy-4a,7-dimethoxy-4,4a-dihydrodibenzo-p-dioxin-2(3H)-one (1), was isolated from the aerial parts of the hybrid Hypericum x 'Hidcote', together with 8 known compounds: caryophyllene-4,5-epoxide, quercetin, quercitrin, quercetin-3-O-beta-D-galactopyranoside, epicatechin, betulinic acid methyl ester, beta-sitosterol and beta-sitosterol glucoside. The structure of the new compound, as well as its absolute configuration, was established by means of spectroscopic data analyses, including 2D NMR spectroscopy and X-ray structural analysis.
authors.affiliation: Centre for Pharmacognosy and Phytotherapy, The School of Pharmacy, University of London, 29-39 Brunswick Square, London WC1N 1AX, UK.
authors.forename: Longru
authors.initials: L
authors.lastname: Sun
authors.forename: M Mukhlesur
authors.initials: MM
authors.lastname: Rahman
authors.forename: Brian W
authors.initials: BW
authors.lastname: Skelton
authors.forename: Simon
authors.initials: S
authors.lastname: Gibbons
mesh_terms: D004147:Dioxins / Q000737:chemistry / Q000302:isolation & purification*; D020902:Hypericum / Q000737:chemistry*; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D018547:Plant Stems
chemical_list: C553852:4-hydroxy-4a,7-dimethoxy-4,4a-dihydrodibenzo-p-dioxin-2(3H)-one; D004147:Dioxins; D010936:Plant Extracts