endo-BCN-PEG4-amide-PEG4-tri(PEG4-triazole-PEG4-GGFG-Dxd) is a branched PEG linker, including a BCN group that can react with azide-tagged compounds or biomolecules as well as three DXd payloads, which may be applied in the creation of ADCs. The water solubility of the compound is enhanced via the PEG4 spacers.
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