Stearic acid-PEG2-NHS ester is an amphiphilic linker featuring a hydrophobic C18 fatty acid (stearic acid) tethered to a PEG2 spacer and a reactive NHS ester. This design enables efficient amine conjugation and stable incorporation into liposomes or lipid-based drug delivery systems, with the PEG segment enhancing water solubility and conjugation flexibility.
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