Using CCOCC, COc1c(Cl)c2c(c(Cl)c1OC)C(c1ccccc1)CNCC2 to produce COc1c(Cl)c2c(c(Cl)c1OC)C(c1ccccc1)CN(C)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.