Using Sc1ccc(Cl)cc1, O=C1NC(=O)c2c(Br)c(Br)c(Br)c(Br)c21 to produce O=C1NC(=O)c2c(Sc3ccc(Cl)cc3)c(Sc3ccc(Cl)cc3)c(Sc3ccc(Cl)cc3)c(Br)c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.