Using COc1ccc(-c2ccc3[nH]c4c(c3c2)CCN(Cc2ccccc2)CC4)cc1 to produce COc1ccc(-c2ccc3[nH]c4c(c3c2)CCNCC4)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.