氨基PEG羟基,NH2-PEG-OH PS2-NO 上海芃硕生物科技有限公司

p1Src=//y3.yzimgs.com/uploads/484807/2018313-1603881.png?watermark/2/text/5LiK5rW36IqD56GV55Sf54mp56eR5oqA5pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/400/fill/I0E3QTlBOA==/gravity/SouthEast"