3,4-Dibromo-Mal-PEG4-bis-PEG4-acid functions as a branched PEG linker with a dibromomaleimide group that allows for two points of attachment since both of the bromine atoms can be substituted, and the two carboxylic groups can be derivatized for further conjugation. Water solubility is enhanced via the PEG arms. The branched structure permits conjugation to ADC payloads or other entities.
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