title: Sesquiterpene lactones from Achillea collina Becker.
abstract: Aerial parts of Achillea collina afforded, in addition to five known sesquiterpene lactones two new germacranolides and one new eudesmanolide, the structures of which were elucidated by spectroscopic methods.
authors.affiliation: Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia.
authors.forename: Elena
authors.initials: E
authors.lastname: Mustakerova
authors.forename: Milka
authors.initials: M
authors.lastname: Todorova
authors.forename: Elena
authors.initials: E
authors.lastname: Tsankova
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D002251:Carbon Tetrachloride; D007783:Lactones / Q000737:chemistry / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008968:Molecular Conformation; D010936:Plant Extracts / Q000737:chemistry*; D012717:Sesquiterpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D007783:Lactones; D010936:Plant Extracts; D012717:Sesquiterpenes; D002251:Carbon Tetrachloride