丙烯酰胺PEG羧基，ACA-PEG-COOH PS2-CMACA 图片

p1Src=//y2.yzimgs.com/uploads/505571/2019411-11923143.png?watermark/2/text/5LiK5rW36IqD5Zyj55Sf54mp56eR5oqA5pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/650/fill/I0E3QTlBOA==/gravity/SouthEast"