A new PE-PEG derivative with an active carboxylic terminal, DPPE-PEG3000-COOH, was synthesized and purified.

• 合成和纯化了一个带末端羧基的新的磷脂酰乙醇胺的聚乙二醇衍生物3/4DPPE-PEG3000-COOH。