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  • Picralima
  • A new indole alkaloid, picranitine, has been-isolated from the seeds of Picralima nitida, along with five known, indole alkaloids picratidine, akuammine, pseudoakuammine, akuammicine and akuammidine previously identified from the same source. (lu.se)
  • article{05fd279f-0f24-4a6f-b046-855bf693628d, abstract = {A new indole alkaloid, picranitine, has been-isolated from the seeds of Picralima nitida, along with five known, indole alkaloids picratidine, akuammine, pseudoakuammine, akuammicine and akuammidine previously identified from the same source. (lu.se)
  • compounds
  • The plant parts are rich in various bioactive compounds such as echitamidine, N α -formylechitamidine, boonein, loganin, lupeol, ursolic acid, and β -amyrin among which the alkaloids and triterpenoids form a major portion. (hindawi.com)
  • derivatives
  • The latter include terpenoid structural elements, synthesized by living organisms from dimethylallyl pyrophosphate (DMAPP) and/or isopentenyl pyrophosphate (IPP): Non-isoprenoid: Simple derivatives of indole Simple derivatives of β-carboline Pyrroloindole alkaloids Indole-3-carbinole Indoleacetic Trypamines Carbazoles Isoprenoid: hemiterpenoids: ergot alkaloids monoterpenoids. (wikipedia.org)
  • One of the simplest and yet widespread indole derivatives are the biogenic amines tryptamine and 5-hydroxytryptamine (serotonin). (wikipedia.org)
  • Pyrolo-indole alkaloids form a relatively small group of tryptamine derivatives. (wikipedia.org)
  • Natural derivatives of aplysinopsin differ in the bromination pattern of the indole moiety ( Figure 1 ), variation in the structure of the C ring, including its oxidation state ( Figure 3 ) and number and position of N -methylation ( Figure 1 ), the presence and absence of the C-8-C-1′ double bond ( Figure 2 ), and the stereochemistry. (mdpi.com)
  • The indole-2,3-dione motif present in trikentramides A-C is rare in nature, and this is the first report of these oxidized indole derivatives from a marine sponge. (edu.au)
  • quaternary
  • A new quaternary indole alkaloid, venecurine, has been isolated by chromatographie techniques from a curare obtained from the Hoti tribe of Venezuela. (uclouvain.be)
  • The application of a quantum mechanical modeling method, density functional theory, confirmed the relative configurations and also validated the downfield carbon chemical shift observed for one of the quaternary carbons (C-5a) in the cyclopenta[g]indole series. (edu.au)
  • tabersonine
  • Growth of seedlings in the dark resulted in an early ubiquitous accumulation of tabersonine as a major alkaloid and in the subsequent day 5-10 cotyledon restricted accumulation of vindoline and its immediate precursors. (naver.com)
  • Uleine
  • The major peak in the HPLC-DAD chromatograms of the ethanol extract, alkaloid and neutral fractions suggested the presence of uleine that was isolated from the alkaloid fraction by column chromatography and was characterized by spectroscopic methods. (biomedcentral.com)
  • Moreover, 15 other indole alkaloids have been identified along with uleine. (biomedcentral.com)
  • NMR decoupling experiments revealed that apparicine lacks an N-methyl signal and has one methylenic carbon atom between the nitrogen atom and the indole rings, allowing researchers to distinguish it from uleine. (wikipedia.org)
  • methyl
  • Background: Geissoschizine methyl ether (GM) is one of the indole alkaloids in Uncaria hook, and an active ingredient of yokukansan (YKS) that improves behavioral and psychological symptoms of dementia (BPSD) in patients with several types of dementia. (eurekaselect.com)
  • structural
  • The correct structural formula of strychnine was determined only in 1947, although the presence of the indole nucleus in the structure of strychnine was established somewhat earlier. (wikipedia.org)
  • This review discusses the isolation, structural elucidation, and biological activities of halogenated indole alkaloids obtained from marine invertebrates. (pubmedcentralcanada.ca)
  • Production
  • 2008). Mutations in topoisomerase I as a self-resistance mechanism coevolved with the production of the anticancer alkaloid camptothecin in plants. (wikipedia.org)