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- W69976722 abstract "The NMR spectrum of caffein shows three NCH3 peaks. By study of solvent effect and pH effect on this spectrum, it was possible to make a correct attribution of the absorption peaks. A proof of this attribution was searched in the examination of NMR spectra of theophylline and theobromine. Two new chlorocaffeins were prepared during this work. L'attribution des signaux NCH3 de la caféine en spectroscopie de résonance magnétique nucléaire a été effectuée sur la base de l'effet de pH et de solvant sur la position de ces différents signaux. Une confirmation de cette attribution a été obtenue par étude des spectres de résonnace magnétique nucléaire des théophylline, théobromine et 8-chloro-3,7-dichlorométhylène-1-méthylxanthine." @default.
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- W69976722 date "1965-01-01" @default.
- W69976722 modified "2023-09-23" @default.
- W69976722 title "Étude de l'effet de solvant en résonance magnétique nucléaire—I" @default.
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- W69976722 doi "https://doi.org/10.1016/s0040-4020(01)96966-2" @default.
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