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Carbon-13 spin-lattice relaxation times and nuclear Overhauser enhancement factors are reported for sucrose and a disaccharide methyl glycoside dissolved in a 7:3 molar solvent mixture of D2O and DMSO-d6 at several magnetic fields. Data which correspond to both sides of the maximum in the T1−1 versus the inverse temperature curves were collected in the temperature range of −15 to + 30°C. Rotational diffusion models are used to determine the overall and internal dynamics of the molecules. The analysis gives an estimate of the rapid initial averaging due to internal fluctuations and activation energies for the overall and methyl rotation.