title: Sesquiterpenoids from Inula britannica.
abstract: Phytochemical investigation of the flowers of Inula britannica led to the isolation of nineteen sesquiterpenoids (1- 19), including britanlins E-J ( 2, 3, 5, 8, 13, and 14, respectively) and known sesquiterpenoids (1, 4, 6, 7, 9- 12, and 15- 19). The structures of these isolates were elucidated by detailed spectroscopic analyses and comparison to the previously reported spectroscopic data. The absolute configurations of compounds 12, 15, 17, and 19 were determined by X-ray single crystal diffraction analyses and chemical transformations.
authors.affiliation: State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, People's Republic of China.
authors.forename: Jun-Li
authors.initials: JL
authors.lastname: Yang
authors.forename: Rui
authors.initials: R
authors.lastname: Wang
authors.forename: Lei-Lei
authors.initials: LL
authors.lastname: Liu
authors.forename: Yan-Ping
authors.initials: YP
authors.lastname: Shi
mesh_terms: D035264:Flowers; D038143:Inula / Q000737:chemistry*; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry*; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D010936:Plant Extracts; D012717:Sesquiterpenes