title: New sesquiterpene lactones from the aerial parts of Pseudoelephantopus spicatus.
abstract: Two new sesquiterpene lactones, spicatolide C (1) and spicatocadinanolide A (2), have been isolated along with the known piptocarphol isomers (3, 4) and one eudismane type sesquiterpene (5) from the EtOAc extract of the aerial parts of Pseudoelephantopus spicatus. The structures and the relative stereochemistries of the new metabolites were determined by spectroscopic methods.
authors.affiliation: Graduate Institute of Natural Products, Kaohsiung Medical University, Taiwan.
authors.forename: Hamad Hassan
authors.initials: HH
authors.lastname: Issa
authors.forename: Sue-Ming
authors.initials: SM
authors.lastname: Chang
authors.forename: Yu-Liang
authors.initials: YL
authors.lastname: Yang
authors.forename: Fang-Rong
authors.initials: FR
authors.lastname: Chang
authors.forename: Yang-Chang
authors.initials: YC
authors.lastname: Wu
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D007783:Lactones / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy / Q000379:methods / Q000592:standards; D008958:Models, Molecular; D008968:Molecular Conformation; D035261:Plant Components, Aerial / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D012015:Reference Standards; D012717:Sesquiterpenes / Q000737:chemistry* / Q000302:isolation & purification; D013237:Stereoisomerism
chemical_list: D007783:Lactones; D012717:Sesquiterpenes; C516735:spicatocadinanolide A; C516736:spicatolide C