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Scheme of the various possible advantages provided by 13C-labeled carbohydrates for NMR studies. (A) 2D-1H–13C-HSQC experiments to study interactions and recognition events involving carbohydrates. (B) Selective labeling strategies to reduce overlapping and signal crowding of NMR spectra in long and complex oligosaccharides. (C) 13C-labeling applied to study conformations through the analysis of 1H–13C coupling constants.
