The present invention relates to Y-shape branched PEG derivatives of formulae (I) to (IV). The present invention also relates to conjugates of these Y-shape derivatives and drug molecules, pharmaceutical compositions comprising those conjugates.
本发明涉及式(I)至(IV)的 Y 型支链 P
EG 衍
生物。本发明还涉及这些 Y 型衍
生物和药物分子的共轭物,以及包含这些共轭物的药物组合物。