Hydrophilic polymer derivative with y type branch and preparation method of it medical cpmposite comprising above compund
First Claim
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1. A Y-shaped branched hydrophilic polymer derivative represented by formula I:
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Abstract
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.
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Citations
59 Claims
- 1. A Y-shaped branched hydrophilic polymer derivative represented by formula I:
- 4. A Y-shaped branched polyethylene glycol derivative represented by formula II:
- 5. A Y-shaped branched polyethylene glycol derivative represented by formula III:
- 6. A Y-shaped branched polyethylene glycol derivative represented by formula IV:
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14. (canceled)
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