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Synthesis of peptides 1-3 and peptide-cryptophane conjugates I-III. Azidopeptide on solid support was reacted with monopropargyl-cryptophane-A via a Cu(I)-mediated [3 + 2] cycloaddition reaction. (PEG)7 = -(CH2)2-O-(CH2CH2O)7-CH2CH2NHCOCH2OCH2.
