(Amido-Mal-PEG4)-Glu(methyltetrazine-O-propylamido)-(m-PEG24) OC(CCOCC(NC(CC1=CC=C(C2=NN=C(C)N=N2)C=C1)=O)COCCC(O)=O)=O 1021/ja108258d Keywords: biotin azide
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