Lys(MMT)-PAB-oxydiacetamide-PEG8-N3 is a cleavable antibody agent conjugate linker used in the synthesis of antibody-drug conjugates (ADCs)[1]. Lys(MMT)-PAB-oxydiacetamide-PEG8-N3 is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. Strain-promoted alkyne-azide cycloaddition (SPAAC) can also occur with molecules containing DBCO or BCN groups.