| 摘要 |
<p>Compounds of the formula <IMAGE> wherein R1 is hydrogen, an optionally substituted aromatic hydrocarbon radical, an aralkyl radical or an optionally substituted aliphatic hydrocarbon radical having up to 45 C atoms, R2 is an optionally substituted aromatic hydrocarbon radical, an aralkyl radical or an optionally substituted aliphatic hydrocarbon radical having 5-50 C atoms, X is O, S, NH or NR, R being an alkyl radical having up to 20 C atoms, and Z is a glycosyl radical bonded via the anomeric carbon atom, or pharmaceutically acceptable salts thereof stimulate the immune system.</p> |
