2107273-62-9

N-methyl-N'-methyl-O-(m-PEG4)-O'-(propargyl-PEG4)-Cy3 is a PEG linker containing cyanine dye with excitation/emmission maximum 555/570 nm and an alkyne group, which enables copper-catalyzed Click Chemistry. The hydophilic PEG spacer increases solubility in aqueous media.