叶酸PEG羧基，FA-PEG-COOH PS2-F... 上海芃硕生物科技有限公司

p1Src=//y1.yzimgs.com/uploads/484807/2018323-142126310.png?watermark/2/text/5LiK5rW36IqD56GV55Sf54mp56eR5oqA5pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/700/fill/I0E3QTlBOA==/gravity/SouthEast"