甲氧基PEG羧基 MPEG-COOH PS1... 上海芃圣生物科技有限公司

p1Src=//y2.yzimgs.com/uploads/505571/2019413-17468478.png?watermark/2/text/5LiK5rW36IqD5Zyj55Sf54mp56eR5oqA5pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/300/fill/I0E3QTlBOA==/gravity/SouthEast"