title: Anthraquinones from Hedyotis capitellata.
abstract: Four new furanoanthraquinones, 2-hydroxymethyl-3,4-[2'-(1-hydroxy-1-methylethyl)-dihydrofurano]-8-hydroxyanthraquinone, 2-hydroxymethyl-3,4-[1'-hydroxy-2'-(1-hydroxy-1-methylethyl)-dihydrofurano]-8-hydroxyanthraquinone, 2-hydroxymethyl-3,4-[2'-1-hydroxy-1-methylethyl)-dihydrofurano]anthraquinone and 2-methyl-3,4-[2'-(1-hydroxy-1-methylethyl)-dihydrofurano] anthraquinone or capitellataquinone A-D and four known anthraquinones, rubiadin, anthragallol 2-methyl ether, alizarin 1-methyl ether and digiferruginol, together with scopoletin were isolated from the stems of Hedyotis capitellata Wall (Rubiaceae). Lucidin-3-O-beta-glucoside was isolated from the roots of the plant. Characterization of the new compounds was carried out by extensive NMR studies using FGCOSY, FGHMQC, FGHMBC and DEPT-135 in addition to other spectroscopic methods.
authors.affiliation: Faculty of Applied Science, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia.
authors.forename: Rohaya
authors.initials: R
authors.lastname: Ahmad
authors.forename: Khozirah
authors.initials: K
authors.lastname: Shaari
authors.forename: Nordin Hj
authors.initials: NH
authors.lastname: Lajis
authors.forename: Ahmad Sazali
authors.initials: AS
authors.lastname: Hamzah
authors.forename: Nor Hadiani
authors.initials: NH
authors.lastname: Ismail
authors.forename: Mariko
authors.initials: M
authors.lastname: Kitajima
mesh_terms: D000880:Anthraquinones / Q000737:chemistry*; D032064:Hedyotis / Q000737:chemistry*; D008956:Models, Chemical; D015394:Molecular Structure; D018547:Plant Stems / Q000737:chemistry
chemical_list: D000880:Anthraquinones