Abstract
Hepta-O-acetyl-4-O-(α-D-glucopyranosyl)-D-glucuronic acid (VII) was obtained in crystalline state by potassium permanganate oxidation of 1, 2, 3, 2', 3', 4', 6'-hapta-O-acetyl-D-maltose (VI), and by de-acetylation of VII, 4-O-(α-D-glucopyranosyl)-D-glucuronic acid (GU) was obtained. The acid hydrolysis rate of GU was also decribed.