Browsing by Author "Christen, Philippe"

Now showing items 1-8 of 8

    • Analysis of isomeric tropane alkaloids from Schizanthus grahamii by very fast gas chromatography 
      Bieri, Stefan; Muñoz Muñoz, Orlando; Veuthey, Jean-Luc; Christen, Philippe (WILEY-V C H VERLAG GMBH, 2006-01)
      This study presents a very fast GC analysis applied for the baseline separation of isomeric tropane alkaloids extracted from the stem-bark of Schizanthus grahamii (Solanaceae). The work provided a challenging application ...
    • Chemistry and biological activity of alkaloids from the genus Schizanthus 
      Christen, Philippe; Cretton, Sylvian; Humam, Munir; Bieri, Stefan; Muñoz Muñoz, Orlando; Joseph-Nathan, Pedro (Springer, 2020)
      The genusSchizanthus(Solanaceae) comprises 12 accepted species primarily endemic to Chile. It is characterized by the presence of numerous tropane alkaloids found as ester derivatives of isomeric acids like angelic, ...
    • Hygroline derivatives from schizanthus tricolor and their anti-trypanosomatid and antiplasmodial activities 
      Cretton, Sylvian; Genta Jouve, Gregory; Kaiser, Marcel; Mäser, Pascal; Muñoz, Orlando; Bürgi, Thomas; Cuendet, Muriel; Christen, Philippe (Elsevier, 2021)
      Chemical investigation of the alkaloid extract of the aerial parts of Schizanthus tricolor led to the targeted isolation of 26 hygroline derivatives of which 20 were fully characterized. They have not yet been described ...
    • In vitro shoot and root organogenesis, plant regeneration and production of tropane alkaloids in some species ... 
      Jordan, Miguel; Humam, Munir; Bieri, Stefan; Christen, Philippe; Poblete, Estrella; Muñoz Muñoz, Orlando (PERGAMON-ELSEVIER SCIENCE LTD, 2006-03)
      A rapid in vitro propagation system leading to formation of shoots from callus, roots, and plantlets was developed for Schizanthus hookeri Gill. (Solanaceae), an endemic Chilean plant. The genus Schizanthus is of particular ...
    • Isomeric Tropane Alkaloids from the Aerial Parts of Schizanthus tricolor 
      Cretton, Sylvian; Glauser, Gaetan; Humam, Munir; Jeannerat, Damien; Muñoz Muñoz, Orlando; Maes, Louis; Christen, Philippe; Hostettmann, Kurt (AMER CHEMICAL SOC, 2010-02-18)
      Investigation of the aerial parts of Schizanthus tricolor yielded seven isomeric tropane alkaloids: 3 alpha-(1-methylitaconyl)-6 beta-senecioyloxytropane 3a-(1-methylitaconyl)-6 beta-angeloyloxytropane (2), 3 alpha-(1-me ...
    • Schizanthines N, O, and P, Tropane Alkaloids from the Aerial Parts of Schizanthus tricolor 
      Humam, Munir; Kehrli, Thomas; Jeannerat, Damien; Muñoz Muñoz, Orlando; Hostettmann, Kurt; Christen, Philippe (AMER CHEMICAL SOC, 2011-01)
      Three tropane alkaloids, named schizanthines N, O, and P (1-3), have been isolated from the crude alkaloid extract of the endemic Chilean plant Schizanthus tricolor. On the basis of extensive NMR studies and MS fragmentation ...
    • Tropane alkaloids of the aerial parts of Schizanthus tricolor 
      Humam, Munir; Muñoz Muñoz, Orlando; Christen, Philippe; Hostettmann, Kurt (2007)
      The alkaloid profile of the aerial parts of Schizanthus tricolor Grau et Gronbach was investigated by GC-MS. Seventeen alkaloids were detected and are reported in this species for the first time. They were identified by ...
    • Use of porous graphitic carbon column for the separation of natural isomeric tropane alkaloids by capillary ... 
      Bieri, Stefan; Varesio, Emmanuel; Muñoz Muñoz, Orlando; Veuthey, Jean-Luc; Christen, Philippe (PERGAMON-ELSEVIER SCIENCE LTD, 2006-02-24)
      This study presents the outstanding chromatographic selectivity of a porous graphitic carbon support for the separation of four isomeric tropane alkaloids from the stem-bark of Schizanthus grahamii (Solanaceae). Capillary ...