Using BrCCC1Cc2ccccc21, COc1cc2c(cc1N1CCNCC1)OCC2 to produce COc1cc2c(cc1N1CCN(CCC3Cc4ccccc43)CC1)OCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.