Patent ID: 8440238

Claim:
A method for treating a tumor in a subject in need thereof, the method comprising: administering to the subject in need thereof an effective amount of a sulfated derivative of gastrodia elata polysaccharide extracted from gastrodia elata , wherein the gastrodia elata polysaccharide has the following structure: wherein x and y are each an integer x+y=16, n is an integer, the gastrodia elata polysaccharide has a mean molecular weight of 2.8×10 5 with a specific rotation of +95° in a 0.5 mg/mL aqueous solution thereof; and the sulfated derivative of the gastrodia elata polysaccharide is a derivative sulfated mainly at the 6-hydroxy of the gastrodia elata polysaccharide with a mean molecular weight of 6.5×10 4 and a specific rotation of +150.0° in a 0.5 mg/mL aqueous solution thereof.