Short-RInChIKey=SA-FUHFF-UHFFFADPSC-SCCUVBVHKK-UHFFFADPSC-NUHFF-MUHFF-NUHFF-ZZZ

CB7-(Opr)1 (8.7 mg, 7.2 μmol) and BC-TEG-N3 (7.9 mg, 13.0 μmol) were dissolved in 700 μL DMSO. In a second flask, Sodium L-ascorbate (10.0 mg, 50.0 μmol) was added to 2.8 mL 55% DMSO aqueous solution containing CuSO4 (4.5 mg, 28.0 μmol). The two solutions were mixed and stirred at room temperature for 24 h. Afterwards, 50 mL diethyl ether was added and the resulting precipitate was washed three times with 25 mL MeOH. Drying under high vacuum afforded a dark solid.