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                    ɑ-Butyric Acid NHS Ester-ω-Pentynoic(2-Boc-Amino) PEG
                
                                1310000-35-70-21.500MG
            
            
                                10 000 Dalton
                            
            
                
                    ɑ-Butyric Acid NHS Ester-ω-Pentynoic(2-Boc-Amino) PEG
                
                                1320000-35-70-21.500MG
            
            
                                20 000 Dalton
                            
            