- Glucosamine peptide derivatives, their production and use
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Novel glucosamine-peptide derivatives of the formula: STR1 wherein m is 0 or 1; n is 0 or an integer of 1 to 9; R is lower alkyl which may be substituted with hydroxyl, or aryl; R1 is hydrogen or acyl having an acyclic hydrocarbon group, the terminal of which may be substituted with a cyclic hydrocarbon group directly, via a carbonyl group or via an oxygen atom; provided that when R1 is hydrogen m is 1; R2 is hydrogen or lower alkyl which may form a ring by connecting its terminal with the α-nitrogen atom when n is 0, or hydrogen when n is an integer of 1 to 9; R3 is hydrogen or lower alkyl; R4 and R5 are each hydrogen or lower alkyl which may be substituted with hydroxyl or benzyloxyl; R6 is hydrogen or lower alkyl; R7 is alkyl which may be substituted with lower alkoxyl or aralkyl; R8 and R9 are each hydrogen, lower alkyl or aralkyl; and (D) and (L) each indicate configurations if their respective carbon atoms are asymmetric; or an acid addition salt thereof, have immunostimulatory activity.
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