Using CCOC(=O)CCCBr, O=C(c1cc(F)cnc1Oc1cc(Cl)ccc1Cl)N1CCNc2ccccc21 to produce CCOC(=O)CCCN1CCN(C(=O)c2cc(F)cnc2Oc2cc(Cl)ccc2Cl)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.