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Reaction conditions: carbohydrate = 0.55 mmol based on monosaccharide units, n (AlCl3) = 0.025 mmol, pH = 2.5, NaCl/aqueous phase mass ratio of 0.4, CPME to water volume ratio of 3, reaction temperature of 175 °C, reaction time of 20 min. aReaction temperature of 190 °C, reaction time of 60 min.
