title: Xanthane sesquiterpenoids from the roots and flowers of Xanthium cavanillesii.
abstract: The sesquiterpene lactones xanthanodiene, 4-epi-xanthanol, 4-epi-isoxanthanol, and 4-epi-xanthinin, as well as the xanthanolide derivative 4-oxo-bedfordia acid were isolated from the chloroform extracts of roots and flowers of Xanthium cavanillesii Schouw. The identities of these compounds were corroborated through comparison of their spectroscopic data, including IR, MS, and (1)H and (13)C NMR assignments, with literature reports. In addition, the structural characterization of 4-oxo-bedfordia acid was revisited and a comprehensive spectroscopic study of the compound is presented. This is to our knowledge the first phytochemical investigation of the roots of X. cavanillesii, and of flowers in the whole Xanthium genus.
authors.affiliation: a Facultad de Química, Departamento de Química Orgánica , UdelaR , Montevideo , Uruguay.|b Espacio de Ciencia y Tecnología Química , Centro Universitario de Tacuarembó, UdelaR , Tacuarembó , Uruguay.
authors.forename: Cristina
authors.initials: C
authors.lastname: Olivaro
authors.affiliation: a Facultad de Química, Departamento de Química Orgánica , UdelaR , Montevideo , Uruguay.
authors.forename: Vanesa
authors.initials: V
authors.lastname: Rostan
authors.affiliation: a Facultad de Química, Departamento de Química Orgánica , UdelaR , Montevideo , Uruguay.
authors.forename: Daniela
authors.initials: D
authors.lastname: Bandera
authors.affiliation: c Departamento de Química del Litoral, CENUR Litoral Norte , UdelaR , Paysandú , Uruguay.
authors.forename: Guillermo
authors.initials: G
authors.lastname: Moyna
authors.affiliation: a Facultad de Química, Departamento de Química Orgánica , UdelaR , Montevideo , Uruguay.
authors.forename: Alvaro
authors.initials: A
authors.lastname: Vazquez
mesh_terms: D035264:Flowers / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D018517:Plant Roots / Q000737:chemistry; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification*; D031210:Xanthium / Q000737:chemistry*
chemical_list: D012717:Sesquiterpenes
keywords: 4-Oxo-bedfordia acid; Abrojo; Xanthium cavanillesii Schouw; xanthane sesquiterpenoids; xanthanolides