2,5,8,11-Tetraoxatridecan-13-oic acid, 3-oxo-, methyl ester

methyl 2-[2-(2-methoxy-2-oxoethoxy)ethoxy]acetate

2-[2-[2-[2-(2-hydroxyethoxy)ethoxy]ethoxy]ethoxy]acetic acid

2-[2-[2-(2-ethenoxyethoxy)ethoxy]ethoxy]ethanol

四(乙二醇)二乙烯基醚