甲氧基聚乙二醇-琥珀酰亚胺酯,97% average Mw1000
甲氧基聚乙二醇-琥珀酰亚胺酯,97% average Mw2000
甲氧基聚乙二醇-琥珀酰亚胺酯,97% average Mw5000