聚氧乙烯十六烷基(4)醚

5-[2-[2-[2-[2-(4-carboxybutanoyloxy)ethoxy]ethoxy]ethoxy]ethoxy]-5-oxopentanoic acid

2,6-二氧代-4-硫杂-18-冠醚-6

Boc-11-amino-3,6,9-trioxaundecanoic acid