N-(TCO-PEG4-amido-PEG3)-N-bis-(PEG3-Amino-Tri-(Propargyl-PEG2-ethoxymethyl)-methane) represents a branched PEG linker comprised of six terminal alkyne groups to conjugate with azide-containing entities, and a terminal TCO group for rapid tetrazine ligation. The PEG branches improve the compound's water solubility. The branched architecture supports the attachment of ADC payloads or other molecules.
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