A compound of the formula:
wherein each of R1 and R2 is hydrogen or aliphatic acyl, A is amino which may be protected, X is an amino acid sequence consisting of 1 to 10 amino acid residues which contain at least one amino acid residue having a water-solubility enhancing group, or a salt thereof has an activity of remarkably improving hematopoietic disorder and is useful as an immuno-stimulating agent or an agent for treating thrombocytopenia.
式中的化合物:
其中 R1 和 R2 均为氢或脂族酰基,A 为可被保护的
氨基,X 为由 1 至 10 个
氨基酸残基组成的
氨基酸序列,其中至少含有一个具有
水溶性增强基团的
氨基酸残基,或其盐具有显著改善造血障碍的活性,可用作免疫刺激剂或治疗血小板减少症的药物。