N-(Methyltetrazine-PEG8-carbonyl)-N-bis(PEG8-NHS ester) is a branched PEG linker containing a methyltetrazine click chemistry handle for fast conjugation with TCO-bearing molecules, and two terminal NHS esters for conjugating with amine-bearing molecules. Hydrophilicity of the linker is boosted by the PEG arms. The branched structure allows for the attachment of multiple ADC payloads or other molecules.
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