title: A bis-bithiophene from Tridax procumbens L. (Asteraceae).
abstract: The ethyl acetate soluble part of hexane extract of Tridax procumbens yielded a new bis-bithiophene named tridbisbithiophene along with four known terpenoids: taraxasteryl acetate, beta-amyrenone, lupeol and oleanolic acid, which have never been reported so far from Tridax procumbens. The structures of all the isolated constituents were elucidated with the aid of 1D-NMR spectroscopy whereas, the structure of new constituent tridbisbithiophene was confirmed via COSY and HMBC interactions.
authors.affiliation: H.E.J. Research Institute of Chemistry, University of Karachi, Pakistan.
authors.forename: Muhammad Shaiq
authors.initials: MS
authors.lastname: Ali
authors.forename: Muhammad
authors.initials: M
authors.lastname: Jahangir
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D008968:Molecular Conformation; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D009828:Oleanolic Acid / Q000737:chemistry / Q000302:isolation & purification; D010154:Pakistan; D053978:Pentacyclic Triterpenes; D010946:Plants, Medicinal / Q000737:chemistry*; D013261:Sterols / Q000737:chemistry / Q000302:isolation & purification; D013876:Thiophenes / Q000737:chemistry / Q000302:isolation & purification*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification; D000094042:Lupanes
chemical_list: D009828:Oleanolic Acid; D053978:Pentacyclic Triterpenes; D013261:Sterols; D013876:Thiophenes; D014315:Triterpenes; C469771:tridbisbithiophene; C092740:taraxasteryl acetate; C010480:lupeol; D000094042:Lupanes