A conjugate of water soluble polymer-amino acid oligopeptide-drug of Formula (I) below and a pharmaceutical composition comprising the conjugate are provided. In the conjugate, P is a water soluble polymer; X is a linking group, wherein the linking group links P and A
1
; each of A
1
, A
2
and A
3
is independently same or different amino acid residue or amino acid analogue residue; each of D
1
and D
2
is independently same or different drug molecule residue; a is 0 or 1; b is an integer of 2-12; c is an integer of 0-7; d is 0 or 1. The conjugate could improve drug load capacity, water solubility, stability and activity of the drug.
提供一种
水溶性
聚合物-
氨基酸寡肽-药物的共轭物,其
化学式(I)如下,并提供包含该共轭物的制药组合物。在该共轭物中,P是
水溶性
聚合物;X是一个连接基团,连接基团连接P和A1;A1、A2和A3中的每一个独立地是相同或不同的
氨基酸残基或
氨基酸类似物残基;D1和D2中的每一个独立地是相同或不同的药物分子残基;a为0或1;b是2-12的整数;c是0-7的整数;d为0或1。该共轭物能够提高药物的载荷能力、
水溶性、稳定性和活性。