NOVEL POLYSACCHARIDES AND PREPARATION THEREOF

摘要

A NOVEL POLYSACCHARIDE COMPRISING (1->4) BONDED ALPHA-D-GLUCOSE UNITS REPRESENTED BY THE FOLLOWING FORMULA (FORMULA 1)WHEREIN R IS A HYDROGEN ATOM OR AN ACETYL GROUP IN THE RATIO OF CA. 7 : 3 IS EXTRACTED AND ISOLATED FROM A LIQUID CULTURE MEDIUM OF A MICROORGANISM BELONGING TO THE GENUS BASIDIOMYCETES IN THE PRESENCE OF A PLANT TISSUE RAW MATERIAL. ABOUT 30BY MOLE OF HYDROXYL GROUPS AT THE2, 3-POSITIONS OF EACH UNIT IS ACETYLATED AND THE POLYSACCHARIDE HAS A MOLECULAR WEIGHT OF 500 TO 10,000. THE POLYSACCHARIDE HAS PROPERTIES OF BIOLOGICAL RESPONSE MODIFIERS (BRM) AND IS USEFUL AS AN IMMUNO-ENHANCING AGENT OR IMMUNO-ACTIVATOR.