Using CI, Cc1nc2c(OCc3c(Cl)ccc(N(C)C(=O)CO)c3Cl)cccn2c1Br to produce COCC(=O)N(C)c1ccc(Cl)c(COc2cccn3c(Br)c(C)nc23)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.