Azido-PEG4-Amido-Tris 是一种 PROTAC linker，属于 PEG 类。可用于合成 PROTAC 分子。Azido-PEG4-Amido-Tris 是一种点击化学试剂。它含有 Azide 基团，可以和含有 Alkyne 基团的分子发生铜催化的叠氮-炔环加成反应（CuAAc)。它还可以和含有 DBCO 或 BCN 基团的分子发生环张力驱动的炔-叠氮环加成反应 (SPAAC)。 Azido-PEG4-Amido-tri-(carboxyethoxymethyl)-methane is a multi-arm PEG containing an azide group and three hydroxyl groups. The azide group enables Click Chemistry. The indicated molecular weight of the multi-arm PEG is the sum of the molecular weights of all the arms. The hydroxyl group enables further derivatization or replacement with other reactive functional groups.