Formula: C23H18N2O5, Purity: 97%, MW: 402.4, DBCO-NHS Ester is an amine-reactive compound and can be used to modify an amine-containing molecule in organic solvents (limited solubility in aqueous media). It reacts with primary amines such as the side chain of lysine residues or aminosilane-coated surfaces at neutral or slightly basic pH to form covalent bonds. The low mass weight will add minimal spacer to modified molecules.