| abstract |
Disclosed is a D-xylopyranoside series compound represented by the following general formula: <IMAGE> in which R1 represents a benzyl group, <IMAGE> (X, Y and p are as defined in the specification), <IMAGE> -S-R2 (R2 is as defined in the specification), or an alkyl group having from 6 to 25 carbon atoms, said compounds alter the nature and amount of proteoglycan on the surface of tumor cells to thereby enhance the immune reaction to said tumor cells. |