1. The acetolysis of three methyl esters of aldobiuronic acids has been studied.
2. The presence of a carboxy group in the glycone stabilizes the glycosidic linkage, and a carboxy group in the aglycone does not affect the strength of the glycosidic linkage in comparison with the neutral analog.
3. The stabilizing influence of the uronic acid residues in the glycone is more pronounced for a 1,4-glycosidic linkage than for a 1,6-linkage.