Using O=C1Nc2cc(Cl)ccc2C1(Br)Cc1cccc(Cl)c1, OCCNc1ccccc1 to produce O=C1Nc2cc(Cl)ccc2C1(Cc1cccc(Cl)c1)N(CCO)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.