英文别名2,2,5-Trimethyl-4-oxo-3,8,11,14,17-pentaoxa-5-azaicosan-20-oic acid; Boc-MeN-PEG4-CH2CH2COOH; 1-{[(tert-butoxy)carbonyl](methyl)amino}-3,6,9,12-tetraoxapentadecan-15-oic acid; 3-[2-[2-[2-[2-[methyl-[(2-methylpropan-2-yl)oxycarbonyl]amino]ethoxy]ethoxy]ethoxy]ethoxy]propanoic acid; N-methyl-N-(t-Boc)-PEG4-COOH; 3-[2-[2-[2-[2-[tert-butoxycarbonyl(methyl)amino]ethoxy]ethoxy]ethoxy]ethoxy]propanoic acid; 3-[2-(2-{2-[2-((tert-butoxycarbonyl)(methyl)amino)ethoxy]ethoxy}ethoxy)-ethoxy]propanoic acid; 3-[2-(2-{2-[2-(tert-butoxycarbonyl-methyl-amino)-ethoxy]-ethoxy}-ethoxy)-ethoxy]-propionic acid; N-methyl-N-( Boc)-PEG4-acid; 5,8,11,14-Tetraoxa-2-azaheptadecanedioic acid, 2-methyl-, 1-(1,1-dimethylethyl) ester; N-methyl-N-(t-Boc)-PEG-COOH 
