Now showing items 1-16 of 16

    • 5-Methylcoumarin derivatives from Aphyllocladus denticulatus 

      Zdero, C.; Bohlmann, F.; Niemeyer, H. M. (1988)
      The aerial parts of Aphyllocladus denticulatus afforded, in addition to some widespread compounds, six 5-methylcoumarin derivatives isolated previo. © 1988.
    • A heliangolide, 3-hydroxyumbelliferone derivatives and diterpenes from Bahia ambrosioides 

      Zdero, C.; Bohlmann, F.; Niemeyer Marich, August (1990)
      The aerial parts of Bahia ambrosioides afforded several germacranolides and heliangolides one of which has not been reported previously. Furthermore, in addition to widespread compounds, four 3-hydroxyumbelliferone derivatives ...
    • An unusual dimeric sesquiterpene and other constituents from Chilean Baccharis species 

      Zdero, C.; Bohlmann, F.; Niemeyer, H. M. (1991)
      The aerial parts of B. santelicis afforded several known furoclerodanes and phenolics. In addition to known compounds an unusual dimeric sesquiterpene and five labdane derivatives were isolated from B. petiolata. The ...
    • Diterpenes and 5-methyl coumarin derivatives from Gypothamnium pinifolium and Plazia daphnoides 

      Zdero, C.; Bohlmann, F.; Niemeyer, H. M. (1988)
      The aerial parts of Gypothamnium pinifolium afforded, in addition to three known 5-methyl coumarins, four new 5-methyl coumarins and two closely related coumaranones. Furthermore, seven diterpenes, all derived from ...
    • Diterpenes and umbelliferone derivatives from Haplopappus deserticola 

      Zdero, C.; Bohlmann, F.; Niemeyer, H. M. (1990)
      The aerial parts of Haplopappus deserticola afforded three ent-labdane and one labdane derivative as well as a nor-ent-labdane. Furthermore, in addition to three known umbelliferone derivatives, a dimeric coumarin was ...
    • Diterpenes from Nardophyllum lanatum 

      Zdero, C.; Bohlmann, F.; Niemeyer, H. M. (1990)
      The aerial parts of Nardophyllum lanatum, collected in northern Chile, gave in addition to a seco-diterpene isolated from an Argentinian collection two new cis-clerodanes and an acid derived from geranyl geraniol. The ...
    • ent-Labdane glycosides from Baccharis pingraea 

      Zdero, C.; Bohlmann, F.; Niemeyer, H. M. (1990)
      The aerial parts of Baccharis pingraea, collected in Chile, afforded, in addition to two diterpene glycosides isolated previously, 14 new ones and two of the corresponding desacyl aglycones. The structures were elucidated ...
    • Friedolabdanes and other constituents from chilean Haplopappus species 

      Zdero, C.; Bohlmann, F.; Niemeyer, H. M. (1991)
      From the aerial parts of Haplopappus pulchellus two new labdanes and six friedolabdanes were isolated while H. arbutoides afforded in addition to known labdanes five new ones, two clerodanes and a cyperone derivative. ...
    • Furolabdanes and linear diterpenes from Gutierrezia resinosa 

      Zdero, C.; Bohlmann, F.; Niemeyer, H. M. (1992)
      The aerial parts of Gutierrezia resinosa gave 15 new diterpenes including 12 labdanes and three nerylgeraniol derivatives. The structures were elucidated by high field NMR spectroscopy. © 1992.
    • Guaianolides and other constituents from Stevia species 

      Zdero, C.; Bohlmann, F.; Niemeyer, H. M. (1991)
      The investigation of three Stevia species afforded a large variety of known sesquiterpene lactones as well as one new guaianolide, two known longipinene derivatives, two ent-labdanes and several other common compounds. © 1991.
    • Highly oxygenated sesquiterpenes from the subtribe nassauviinae 

      Zdero, C.; Bohlmann, F.; Niemeyer, H. M. (1988)
      The aerial parts of Oxyphyllum ulicinum afforded, in addition to known compounds, 15 new germacrane derivatives with a 1β, 10α-epoxide, a carboxyl group at C-4, and different ester groups at C-9 and C-14. From the aerial ...
    • Isocedrene and guaiane derivatives from pleocarphus revolutus 

      Zdero, C.; Bohlmann, F.; Niemeyer, H. M. (1988)
      A reinvestigation of the aerial parts of Pleocarphus revolutus afforded, in addi tion to sesquiterpenes isolated previously, four new guaiane derivatives and four isocedrene derivatives, one of which is new. Furthermore, ...
    • Labdane derivatives and alicyclic diterpenes from Gutierrezia espinosae 

      Zdero, C.; Bohlmann, F.; Niemeyer Marich, August (1990)
      The extract of the aerial parts of Gutierrezia espinosae gave 11 new and two known labdanes as well as five new nerylgeraniol derivatives. The structures were elucidated by high field 1H NMR spectroscopy. The chemotaxonomic ...
    • Seco-, nor-, normal and rearranged labdanes from Haplopappus parvifolius 

      Zdero, C.; Bohlmann, F.; Niemeyer, H. M. (1991)
      The aerial parts of Haplopappus parvifolius afforded 30 new diterpenes including 21 labdane derivatives, four nor-diterpenes, three rearranged ones, four seco-labdanes and one with a new carbon skeleton whose structure was ...
    • Seco-labdanes and other constituents fromOphryosporus floribundus 

      Zdero, C.; Bohlmann, F.; Niemeyer, H. M. (1990)
      The extract of the aerial parts ofO. floribundus afforded in addition to known compounds 17 new diterpenes, including eightseco-ent-labdanes with a very rare carbon skeleton. The structures were elucidated by high field ...
    • Sesquiterpene lactones from Perityle emoryi 

      Zdero, C.; Bohlmann, F.; Niemeyer, H. M. (1990)
      The extract of the aerial parts of Perityle emoryi gave, in addition to seven known sesquiterpene lactones, six new germacranolides and a guaianolide as well as a further thymol derivative together with several known ones ...