Using BrCc1ccc(Br)cc1, CCCc1nc(C(=O)OC)c(C(=O)OC)[nH]1 to produce CCCc1nc(C(=O)OC)c(C(=O)OC)n1Cc1ccc(Br)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.