Using O=C(Cl)c1ccc(Br)cc1, NCCCn1cnc(-c2ccccc2)c1 to produce O=C(NCCCn1cnc(-c2ccccc2)c1)c1ccc(Br)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.