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siparuna pauciflora/alkaloid
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8 risultati
Natural aristolactams and aporphine alkaloids as inhibitors of CDK1/cyclin B and DYRK1A.
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In an effort to find potent inhibitors of the protein kinases DYRK1A and CDK1/Cyclin B, a systematic in vitro evaluation of 2,500 plant extracts from New Caledonia and French Guyana was performed. Some extracts were found to strongly inhibit the activity of these kinases. Four aristolactams and one
Alkaloids of Siparuna tonduziana.
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Alkaloids of Siparuna Griseo-flavescens.
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Alkaloids of Siparuna pauciflora.
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Sipaucins A-C, sesquiterpenoids from Siparuna pauciflora.
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The phytochemical investigation of the leaves of Siparuna pauciflora yielded three novel sesquiterpenoids: the germacrane sipaucin A, the elemane sipaucin B and sipaucin C, comprising a new type of carbon skeleton. In addition, four known aporphine alkaloids-nor-boldine, boldine, laurotetanine, and
Chemical ecological characteristics of herbivory of Siparuna guianensis seeds by buffy-headed marmosets (Callithrix flaviceps) in the Atlantic Forest of southeastern Brazil.
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The buffy-headed marmoset (Callithrix flaviceps) is apparently the only predispersal herbivore of the seeds of Siparuna guianensis at the Caratinga Biological Station in southeastern Brazil. Both the fruit receptacles and the frutioles (seeds) of S. guianensis are relatively rich in nutrients such
Chemistry and pharmacology of Monimiaceae: a special focus on Siparuna and Mollinedia.
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The chemistry and pharmacology of species of the family Monimiaceae are reviewed, with special attention given to the genera Mollinedia and Siparuna, the two most important and representative in Brazil. The isolation of benzylisoquinoline alkaloids and kaempferol derivatives from Siparuna apiosyce
Kaempferol glycosides from Siparuna apiosyce.
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The kaempferol derivative 3,7-di-O-methyl-4'-O-beta-[alpha rhamnosyl (1 --> 6)]-glucopyranoside (siparunoside) was isolated from the leaves of Sparuna apiosyce. Its structure was established by extensive NMR studies. The alkaloids reticuline and liriodenine were also isolated from the leaves along
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