title: Two new germacranolides from Magnolia grandiflora.
abstract: Two new sesquiterpenoids, 4,5-epoxy-13-methoxy-1(10)-germacren-12,6-olide and 4,5-epoxy-13-acetoxy-1(10)-germacren-12,6-olide, were isolated from the leaves of Magnolia grandiflora, together with six known compounds, 2alpha-hydroxy-dihydroparthenolide, parthenolide, costunolide, syringaresinol, (+) medioresinol and 6,7-dimethoxycoumarin. The structures of the new compounds were elucidated on the basis of spectroscopic methods and X-ray diffraction.
authors.affiliation: Kunming Institute of Botany, Chinese Academy of Sciences, Yuman.
authors.forename: S H
authors.initials: SH
authors.lastname: Wu
authors.forename: X D
authors.initials: XD
authors.lastname: Luo
authors.forename: Y B
authors.initials: YB
authors.lastname: Ma
authors.forename: X J
authors.initials: XJ
authors.lastname: Hao
authors.forename: J
authors.initials: J
authors.lastname: Zhou
authors.forename: D G
authors.initials: DG
authors.lastname: Wu
mesh_terms: D002681:China; D004365:Drugs, Chinese Herbal / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D029562:Magnoliaceae / Q000737:chemistry*; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification*; D045788:Sesquiterpenes, Germacrane; D014961:X-Ray Diffraction
chemical_list: C439533:4,5-epoxy-13-acetoxy-1(10)-germacren-12,6-olide; C439532:4,5-epoxy-13-methoxy-1(10)-germacren-12,6-olide; D004365:Drugs, Chinese Herbal; D012717:Sesquiterpenes; D045788:Sesquiterpenes, Germacrane