title: New sesquiterpene lactone and other constituents from Centaurea sulphurea (Asteraceae).
abstract: Five known flavonoids (1-5) and three sesquiterpene lactones (6-8) are reported for the first time from the endemic species Centaurea sulphurea Willd. (Asteraceae). Compound 7 is a new heliangolide (6R, 7R, 8S, 3'R)-8alpha-(3',4'-dihydroxy-methylene-2'-butanoyloxy)-15-oxo-helianga-1 (10), 4(5), 11(13)-trien-6,12-olide, named as sulphurein.
authors.affiliation: Laboratoire d'Obtention de Substances Thérapeutiques (L.O.S.T), Faculté des sciences, Université Mentouri - Constantine, Campus Chaabat Ersas, 25000 Constantine, Algeria.
authors.forename: Hichem
authors.initials: H
authors.lastname: Lakhal
authors.forename: Tarek
authors.initials: T
authors.lastname: Boudiar
authors.forename: Ahmed
authors.initials: A
authors.lastname: Kabouche
authors.forename: Zahia
authors.initials: Z
authors.lastname: Kabouche
authors.forename: Rachid
authors.initials: R
authors.lastname: Touzani
authors.forename: Christian
authors.initials: C
authors.lastname: Bruneau
mesh_terms: D031179:Centaurea / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry*; D015394:Molecular Structure; D012717:Sesquiterpenes / Q000737:chemistry*
chemical_list: D005419:Flavonoids; D012717:Sesquiterpenes; C551421:sulphureidin