Scheme 1.
Chemical structures and representation of PIP-indole-seco-CBI conjugate. (A) 1 (Ac-I-I-P-P-(R)NH-PEG12-Biotinγ-I-I-Indole-seco-CBI). (B) 2 (Ac-I-P-P-P-(R)NH-PEG12-Biotinγ-I-I-Indole-seco-CBI). P = N-methylpyrrole and I = N-methylimidazole.
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