Browsing by Author "18a0d203-3378-4fdc-ab38-e3465703e0cc"
Now showing items 1-10 of 10
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Humam, Munir; Christen, Philippe; Munoz, Orlando; Hostettmann, Kurt; Jeannerat, Damien (2008)The absolute configuration of heterocyclic natural products substituted with two mobile α,β-unsaturated esters was studied using electronic circular dichroism (CD) spectroscopy. The conformational flexibility of the side ...
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Brachet, Anne; Muñoz Muñoz, Orlando; Gupta, Mahabir; Veuthey, Jean Luc; Christen, Philippe (1997)Thirteen alkaloids were identified from the stem-bark of Erythroxylum lucidum by GC-MS. Seven of these have not been reported previously in the genus Erythroxylum. Most of them are precursors or intermediates in the ...
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Christen, Philippe; Bieri, Stefan; Muñoz Muñoz, Orlando (2009)A purified stem bark extract from Schizanthus grahamii was analyzed by combining capillary gas chromatography with a selective nitrogen phosphorus detector, mass spectrometry and Fourier transform infrared spectroscopy. ...
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Muñoz Muñoz, Orlando; Christen, Philippe; Cretton, Sylvian; Backhouse, Nadine; Torres, Vanessa; Correa, Olosmira; Costa, Edda; Miranda, Hugo; Delporte, Carla (2011)Objectives Aristotelia chilensis leaves (Elaeocarpaceae) are used in Chilean folk medicine to treat pain and inflammation. A bioguided study was carried out on serial extracts (hexane, dichloromethane, methanol, aqueous ...
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Humam, Munir; Shoul, Tarik; Jeannerat, Damien; Muñoz Muñoz, Orlando; Christen, Philippe (2011)The strict application of IUPAC rules for the numbering of tropane alkaloids is not always applied by authors and there is hence a lot of confusion in the literature. In most cases, the notation of 3, 6/7-disubstituted ...
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Bieri, Stefan; Varesio, Emmanuel; Veuthey, Jean Luc; Muñoz Muñoz, Orlando; Tseng, Li Hong; Braumann, Ulrich; Spraul, Manfred; Christen, Philippe (2006)Two fully automated HPLC-NMR methods are reported and compared for the structure elucidation of four isomeric tropane alkaloids from the stem-bark of an endemic Chilean plant, Schizanthus grahamii Gill. (Solanaceae). The ...
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Morales, Miguel A.; Ahumada, Frederick; Castillo, Erick; Burgos, Rafael; Christen, Philippe; Bustos, Viviana; Muñoz Muñoz, Orlando (Verlag der Zeitschrift fur Naturforschung, 2013)The relative lack of specificity of atropine as a competitive antagonist of muscarinic receptors is a frequent cause of undesirable parasympathetic side effects. Consequently, new tropane alkaloids with potentially greater ...
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Muñoz, Orlando M.; Maya Arango, Juan; Ferreira, Jorge; Christen, Philippe; San Martín, José; López Muñoz, Rodrigo; Morello Casté, Antonio; Kemmerling Weis, Ulrike (Verlag der Zeitschrift fur Naturforschung, 2013)The extracts of several plants of Central Chile exhibited anti-Trypanosoma cruzi trypomastigotes activity. Most active extracts were those obtained from Podanthus ovatifolius, Berberis microphylla, Kageneckia oblonga, and ...
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Humam, M.; Bieri, S.; Geiser, L.; Muñoz, O.; Veuthey, J. L.; Christen, Philippe (2005)The potential of non-aqueous capillary electrophoresis was investigated for the separation of four isomeric tropane alkaloids, namely 3α-senecioyloxy-7β-hydroxytropane, 3α-hydroxy-7β-senecioyloxytropane, 3α-hydroxy-7β-an ...
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Cretton, Sylvian; Muñoz Muñoz, Orlando; Tapia, Jorge; Marcourt, Laurence; Maes, Louis; Christen, Philippe (Natural Product Incorporation, 2017)Two new hygroline and tropane alkaloids, 4-hydroxybenzenepropanoylhygroline (1) and 3α,4β-dihydroxy-6β-angeloyoxytropane (2) have been isolated from the aerial parts of Schizanthus hookeri and S. tricolor, respectively, ...