Showing results 41 to 46 of 46
  10-Hydroxy-Nb-methyl-corynantheol, a new quaternary alkaloid from the stem bark of Strychnos usambarensis; Angenot, Luc  in Phytochemistry (1988), 27(6), 1923-1926 A new quaternary indole alkaloid: 10-hydroxy-Nb-methyl-corynantheol has been isolated from the stem bark of Strychnos usambarensis by High Speed Counter Current Chromatography (HSCCC). Its IUPAC name is 2 ... [more ▼] A new quaternary indole alkaloid: 10-hydroxy-Nb-methyl-corynantheol has been isolated from the stem bark of Strychnos usambarensis by High Speed Counter Current Chromatography (HSCCC). Its IUPAC name is 2-(2-hydroxyethyl)-3-vinyl-5-methyl-1,2,3,4,6,7,12,12b-octahydro-indolo quinolizinium-9-ol. The structure was established by spectral (UV,IR,EIMS and NMR data) and chemical methods.The stereochemistry was proposedo n the basis of CD curve, NMR studies and biogenetic hypothesis. [less ▲] Detailed reference viewed: 53 (1 ULg)Isolation and Purification of Panarine, a Quaternary Alkaloid from a Venezuelian Curare; Angenot, Luc ; et alin Phytochemistry (1988), 27(12), 4002-4004 High Speed Counter Current Chromatography (HSCCC) has been used to isolate and purify two quaternary alkaloids from a sample of curare prepared by the Panare Indians of Estado Bolivar, Venezuela. One of ... [more ▼] High Speed Counter Current Chromatography (HSCCC) has been used to isolate and purify two quaternary alkaloids from a sample of curare prepared by the Panare Indians of Estado Bolivar, Venezuela. One of the compounds is the known base Macusine B. The other one is a new but related base named panarine. Its structure has been established unequivocally by spectral and X-ray cristallographic analysis. [less ▲] Detailed reference viewed: 29 (0 ULg)Alkaloids of Rauwolfia sellowii from Amazonia; ; et al in Journal de Pharmacie de Belgique (1988), 43(5), 379-381 Reserpiline, sarpagine, lochnerine, harman and beta-yohimbine were the main alkaloids identified in the bark of Rauwolfia sellowii collected in Amazonia. This chemical race could be used for the ... [more ▼] Reserpiline, sarpagine, lochnerine, harman and beta-yohimbine were the main alkaloids identified in the bark of Rauwolfia sellowii collected in Amazonia. This chemical race could be used for the commercial preparation of reserpiline, which is included in various pharmaceutical proprietary preparations used as antihypertensive. [less ▲] Detailed reference viewed: 21 (0 ULg)Strychnochromine, an unusual C18 indoline alkaloid from Strychnos gossweileriAngenot, Luc ; ; et alin Phytochemistry (1988), 27(2), 595-597 Through a combination of spectroscopic techniques (UV, IR, MS, 1H and 13C NMR) it has been possible to propose a plane structure and the relative configuration of strychnochromine a dextrorotatory ... [more ▼] Through a combination of spectroscopic techniques (UV, IR, MS, 1H and 13C NMR) it has been possible to propose a plane structure and the relative configuration of strychnochromine a dextrorotatory alkaloid isolated from the root bark of Strychnos gossweileri. [less ▲] Detailed reference viewed: 33 (2 ULg)Alkaloids of Rauwolfia sellowii from Amazonia; ; et al in Fitoterapia (1988), 59(5), 429 Five indole alkaloids ( reserpiline, sarpagine, lochnerine, harman, beat-yohimbine) are identified in the root bark of Rauwolfia sellowii collected for the first time in Amazonian forest (Rio Branco, Acre ... [more ▼] Five indole alkaloids ( reserpiline, sarpagine, lochnerine, harman, beat-yohimbine) are identified in the root bark of Rauwolfia sellowii collected for the first time in Amazonian forest (Rio Branco, Acre). [less ▲] Detailed reference viewed: 25 (1 ULg)Antimitotic and cytotoxic Activities of Guattegaumerine, a Bisbenzylisoquinoline Alkaloid; Gillet, Marie-Claire ; et alin Planta Medica (1987), 53 Guattegaumerine was isolated from the bark of Guatteria gaumeri ( cf Dehaussy, Tits and Angenot, Planta Med. (1983) 49, 25-27) , a medicinal plant called Yumel in Yucatan (South Mexico).Guattegaumerine ... [more ▼] Guattegaumerine was isolated from the bark of Guatteria gaumeri ( cf Dehaussy, Tits and Angenot, Planta Med. (1983) 49, 25-27) , a medicinal plant called Yumel in Yucatan (South Mexico).Guattegaumerine exerts a good activity at 5 micrograms/ml on B16 melanoma which is a relatively resistant tumor. It is less active against 2002 cells that are normal human cells. [less ▲] Detailed reference viewed: 31 (1 ULg) |
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