Azido-PEG4-4-nitrophenyl carbonate contains an azide group and an reactive nitrophenyl carbonate. The nitrophenyl carbonate group can be used to conjugate with amine bearing molecules to form a stable carbamate linkages. The azide reacts with alkyne through Click Chemistry to form stable triazole linkage. The hydrophilic PEG spacer can increase solubility of the resulting molecule in aqueous media.
Axispharm offers 3000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.