马来酰亚胺PEG羟基，MAL-PEG-OH PS2-MO 图片

p1Src=//y2.yzimgs.com/uploads/484807/201858-94448245.jpg?watermark/2/text/5LiK5rW36IqD56GV55Sf54mp56eR5oqA5pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/300/fill/I0E3QTlBOA==/gravity/SouthEast"