Shanghai Shengli Biotech Co. Ltd is a company specialized in the development of Nonnatural Amino Acid, Peptide Synthesis and related Active Pharmaceutical Ingredient. We've been focusing on the production of various Protected Nonnatural Amino Acid, Amino Acid Derivatives, Linkers for Amino Acid and etc for over ten years. All of these products are widely applied in medical development and the research of biochemistry. We provide high-quality products with favorable price. And the quantity ranges from several grams to dozens of kilograms. We constantly develop new products, so if your requirement is not stated in our product list, please contact us and we are willing to provide you with the best service.