4-N3Pfp-NHS ester

4-N3Pfp-NHS ester is a noncleavable ADC linker used in the synthesis of antibody-dr_ug conjugates (ADCs). 4-N3Pfp-NHS ester 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. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.