title: Sesquiterpene lactones from Anthemis altissima and their anti-Helicobacter pylori activity.
abstract: Seven sesquiterpene lactones, (-) sivasinolide (1), a new naturally occurring eudesmanolide (altissin, 2), desacetyl-beta-cyclopyrethrosin (3), tatridin-A (4), 1-epi-tatridin B (5), 1alpha,10beta-epoxy-6-hydroxy-1,10H-inunolide (6), and spiciformin (7), were isolated from Anthemis altissima. Also isolated were 10 known flavonoids, namely, apigenin (8), kaempferol 4'-methyl ether (9), quercetin (10), quercetin 3-methyl ether (11), isorhamnetin (12), rhamnetin (13), 6-hydroxyquercetin 3,6,4'-trimethyl ether (14), isoquercetrin (15), taxifolin (16), and eriodictyol (17), and one phenolic acid, chlorogenic acid (18). The structure and the stereochemistry of compound 2 were deduced by spectroscopic methods. The in vitro activity of the sesquiterpene lactones (1-5) against Helicobacter pylori, as well as against three Gram-positive and three Gram-negative bacteria growing aerobically, was tested using the microdilution method. Compounds 8-18 have also been tested against H. pylori.
authors.affiliation: Department of Pharmacognosy and Chemistry of Natural Products, School of Pharmacy, University of Athens, Panepistimiopolis, Zografou, GR-157 71, Greece.
authors.forename: Maria
authors.initials: M
authors.lastname: Konstantinopoulou
authors.forename: Anastasia
authors.initials: A
authors.lastname: Karioti
authors.forename: Spyros
authors.initials: S
authors.lastname: Skaltsas
authors.forename: Helen
authors.initials: H
authors.lastname: Skaltsa
mesh_terms: D019659:Asteraceae; D006090:Gram-Negative Bacteria / Q000187:drug effects; D006094:Gram-Positive Bacteria / Q000187:drug effects; D006115:Greece; D016480:Helicobacter pylori / Q000187:drug effects*; D007783:Lactones; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry*; D012717:Sesquiterpenes; D013237:Stereoisomerism
chemical_list: D007783:Lactones; D012717:Sesquiterpenes