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See detailAn indolinic cryptoalkaloid from Strychnos mattogrossensis
Angenot, Luc ULg; Belem-Pinheiro, Maria-Lucia; Imbiriba da Rocha, Arnaldo et al

in Phytochemistry (1990), 29(8), 2746-2749

A new indolinic cryptoalkaloid, mattogrossine, has een isolated from the roots and branches of Strychnos mattogrossensis collected near Manaus. Elucidation of its structure is based mainly on 2D NMR ... [more ▼]

A new indolinic cryptoalkaloid, mattogrossine, has een isolated from the roots and branches of Strychnos mattogrossensis collected near Manaus. Elucidation of its structure is based mainly on 2D NMR studies. Two other indolinic alkaloids were also obtained: strychnobrasiline and 12-hydroxy-11-methoxystrychnobrasiline, and their 13C NMR data are provided [less ▲]

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See detailVenecurine, an Indole Alkaloid from Curare
Quetin-Leclercq, Joëlle; Warin, Roger; Bisset, Norman et al

in Phytochemistry (1989), 28(9), 2221-2223

A new quaternary indole alkaloid, venecurine, has been isolated by chromatographic techniques from a curare obtained from the Hoti tribe of Venezuela. Elucidation of its structure is based mainly on 2D ... [more ▼]

A new quaternary indole alkaloid, venecurine, has been isolated by chromatographic techniques from a curare obtained from the Hoti tribe of Venezuela. Elucidation of its structure is based mainly on 2D-NMR studies. Concurrently with the structural work, frog bioassays were carried out. The curare and venecurine exhibit the same type of activity that is relatively low as compared with the dimeric curarizing alkaloids.These results may be an indication that the sample of curare investigated was a weak one intended to be used for capturing rather than killing animals. [less ▲]

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See detailSix flavonol glycosides from leaves of Strychnos vraiabilis
Brasseur, Thierry; Angenot, Luc ULg

in Phytochemistry (1988), 27(5), 1487-1490

Four new acylated flavonol glycosides have been identified from leaves of Strychnos variabilis : quercetin 3-(4"-trans-p-coumaroyl) robinobioside and its cis-derivative; kaempferol 3-(4"-trans-p-coumaroyl ... [more ▼]

Four new acylated flavonol glycosides have been identified from leaves of Strychnos variabilis : quercetin 3-(4"-trans-p-coumaroyl) robinobioside and its cis-derivative; kaempferol 3-(4"-trans-p-coumaroyl) robinobioside and its cis derivative. quercetin and kaempferol 3-robinobioside-7-glucosides were also identified. [less ▲]

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See detailStrychnochromine, an unusual C18 indoline alkaloid from Strychnos gossweileri
Angenot, Luc ULg; Coune, Claude; Quetin-Leclercq, Joëlle et al

in 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 ▲]

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See detailgamma-Glutamylpeptides from Rhynchosia albiflora.
Wathelet, Bernard ULg; Marlier, M.; Dardenne, G. et al

in Phytochemistry (1988), 27(2),

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See detailIsolation and Purification of Panarine, a Quaternary Alkaloid from a Venezuelian Curare
Quetin-Leclercq, Joëlle; Angenot, Luc ULg; Dupont, Léon et al

in 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 ▲]

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See detail10-Hydroxy-Nb-methyl-corynantheol, a new quaternary alkaloid from the stem bark of Strychnos usambarensis
Quetin-Leclercq, Joëlle; Angenot, Luc ULg

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 ▲]

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See detailFour acylated flavonol glycosides from leaves of Strychnos variabilis
Brasseur, Thierry; Angenot, Luc ULg

in Phytochemistry (1987), 26(12), 3331-3334

Four new acylated flavonol glycosides have been isolated and identified from the leaves of Strychnos variabilis: quercetin3-(4"-trans-p-coumaroyl) robinobioside-7-glucoside (variabiloside A) and its cis ... [more ▼]

Four new acylated flavonol glycosides have been isolated and identified from the leaves of Strychnos variabilis: quercetin3-(4"-trans-p-coumaroyl) robinobioside-7-glucoside (variabiloside A) and its cis derivative ( variabiloside B), kaempferol3-(4"-trans-p-coumaroyl)robinobioside-7-glucoside (variabiloside C) and its cis-derivative ( variabiloside D). [less ▲]

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See detailThe structure of isostrychnopentamine, a bisindole monoterpene alkaloid from Strychnos usambarensis
Tavernier, Dirk; Zhang, Weiguo; Angenot, Luc ULg et al

in Phytochemistry (1987), 26(2), 557-560

The alkaloid isostrychnopentamine has been shown to be epimeric with strychnopentamine at the asymmetric carbon atom of the N-methylpyrrolidin-2-yl group. Its IUPAC name is also given.

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See detailFlavonol glycosides from leaves of Strychnos variabilis
Brasseur, Thierry; Angenot, Luc ULg

in Phytochemistry (1986), 25(2), 563-564

Quercetin 3-O-galactoside, quercetin 3-O-robinobioside and kaempferol 3-O-robinobioside were obtained from the leaves of Strychnos variabilis. These flavonoids were isolated by DCCC (Droplet Counter ... [more ▼]

Quercetin 3-O-galactoside, quercetin 3-O-robinobioside and kaempferol 3-O-robinobioside were obtained from the leaves of Strychnos variabilis. These flavonoids were isolated by DCCC (Droplet Counter Current Chromatography). YThe structures were established by TLC (co-chromatography), UV, NMR ,FAB-MS, hydrolytic and chemical methods. [less ▲]

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See detailStrychnozairine, an indole alkaloid from Strychnos variabilis
Tits, Monique ULg; Tavernier, Dirk; Angenot, Luc ULg

in Phytochemistry (1985), 34(1), 205-207

Through a combination of spectroscopic techniques (UV,CD,IR,MS and NMR) it has been possible to show that strychnozairine, an alkaloid isolated from the root bark of Strychnos variabilis, is N&-acetyl-16 ... [more ▼]

Through a combination of spectroscopic techniques (UV,CD,IR,MS and NMR) it has been possible to show that strychnozairine, an alkaloid isolated from the root bark of Strychnos variabilis, is N&-acetyl-16-R-formyl-19-oxo-20,21-didehydrostrychnane. [less ▲]

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See detail13C NMR des alcaloïdes des Strychnos: les dérivés de l'harmane et de l'usambarensine
Coune, Claude; Angenot, Luc ULg; Denoël, José

in Phytochemistry (1980), 19

13C NMR spectra of some tertiary and quaternary alkaloids are recorded and the signals assigned. Graphic interpretation of off-resonance spectra and substituent shielding effects together with the effect ... [more ▼]

13C NMR spectra of some tertiary and quaternary alkaloids are recorded and the signals assigned. Graphic interpretation of off-resonance spectra and substituent shielding effects together with the effect of Nb-methylation are utilized in the spectral interpretations. [less ▲]

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See detailAlcaloïdes indoliniques du Strychnos variabilis
Tits, Monique ULg; Tavernier, Dirk; Angenot, Luc ULg

in Phytochemistry (1980), 19(7), 1531-1534

Three new indolinic alkaloids have been isolated from the root bark of Strychnos variabilis: strychnopivotine, unusual because the C17 atom of the curane skeleton is lacking, 16-hydroxyisoretulinal and ... [more ▼]

Three new indolinic alkaloids have been isolated from the root bark of Strychnos variabilis: strychnopivotine, unusual because the C17 atom of the curane skeleton is lacking, 16-hydroxyisoretulinal and rosibiline, a derivative of N-desacetylretuline. Their structures were deduced from spectral data and that of rosibiline was confirmed chemically. [less ▲]

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See detailAlkaloids from Strychnos usambarensis: revised structure for usambarine
Angenot, Luc ULg; Coune, Claude; Tits, Monique ULg et al

in Phytochemistry (1978), 17(9), 1687-1689

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See detailLa diplocéline, un alcaloïde nouveau du Strychnos gossweileri
Coune, Claude; Angenot, Luc ULg

in Phytochemistry (1978), 17

Diploceline is the name given to a quaternary alkaloid isolated from Strychnos gossweileri roots. The structure was established on the basis of UV,IR, MS, CD and NMR spectra.

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See detailLa désacétylrétuline extraite du Strychnos variabilis
Angenot, Luc ULg; Bisset, Norman; Franz, Michel

in Phytochemistry (1975), 14

Desacetylretuline has been extracted from the rootbark of Strychnos variabilis collected in Congo (Zaïre). The structure determinatiion was deduced from spectral data (UV,IR, MS, NMR, and CD).It is the ... [more ▼]

Desacetylretuline has been extracted from the rootbark of Strychnos variabilis collected in Congo (Zaïre). The structure determinatiion was deduced from spectral data (UV,IR, MS, NMR, and CD).It is the first time that this alkaloid is found in Nature. [less ▲]

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See detailGamma-glutamylphenylalanine in Dolichos seeds
Dardenne, G. A.; Thonart, Philippe ULg

in Phytochemistry (1973), 12

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See detailEtude chimiotaxonomique dans les genres Macrotyloma, Dolichos et Pseudovigna
Dardenne, G. A.; Thonart, Philippe ULg; Otoul, E. et al

in Phytochemistry (1972), 12

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