2-(Azido-PEG3-amido)-1, 3-bis(NHS ester) 24485 Smiles: CC1=CC=CC2C(=N[C@H](NC(=O)[C@H](CCC(F)(F)F)[C@H](CCC(F)(F)F)C(N)=O)C(=O)NC=21)C1=CC(F)=CC=C1
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