Palmitamide-PEG2-amide-PEG2-acid is a saturated long-chain fatty acid with a 16-carbon backbone and PEG linker containing a terminal carboxylic acid. The hydrophilic PEG spacer increases solubility in aqueous media. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. HATU) to form a stable amide bond.
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