title: Irregular linear sesquiterpene dilactones from Anthemis auriculata Boiss.
abstract: Seven new irregular linear sesquiterpene lactones, epi-antheindurolide A (1), epi-antheindurolide A-5,6-oxide (2), 5-hydroxy-5,6-dihydro-6,13-dehydro-epi-antheinduro lide A (3), 5-hydroperoxy-5,6-dihydro-6,13-dehydro-epi-antheindurolide A (4), epi-antheindurolide B (5), 6-hydroxy-5,6-dihydro-4,5-dehydro-epi-antheindurolide A (6) and 6-hydroperoxy-5,6-dihydro-4,5-dehydro-epi-antheindurolide A (7), were isolated from the flowers of Anthemis auriculata Bioss. Their structures were established by spectroscopic techniques. The discussed compounds were found to be stereoisomers of recently reported lactones for A. arvensis.
authors.affiliation: Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria. todorova@orgchm.bas.bg
authors.forename: Milka
authors.initials: M
authors.lastname: Todorova
authors.forename: Jordanka
authors.initials: J
authors.lastname: Staneva
authors.forename: Pavleta
authors.initials: P
authors.lastname: Denkova
authors.forename: Ljuba
authors.initials: L
authors.lastname: Evstatieva
mesh_terms: D031166:Anthemis / Q000737:chemistry*; D035264:Flowers / Q000737:chemistry; D007783:Lactones / Q000737:chemistry*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D012717:Sesquiterpenes / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D007783:Lactones; D012717:Sesquiterpenes; C534120:epi-antheindurolide A