Amine-PEG4-Amido-tri-(carboxyethoxymethyl)-methane 是一种带有胺和三个末端羧酸基团的支链 PEG 接头。胺基可与羧酸、活化的 NHS 酯、羰基(酮、醛)等反应。末端羧酸基可在活化剂(如 EDC 或 HATU)存在下与伯胺基反应,形成稳定的酰胺键.
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[1]. An S, et al. Small-molecule PROTACs: An emerging and promising approach for the development of targeted therapy drugs. EBioMedicine. 218 Oct;36:553-562