Using Cc1nc(-c2ccc(Cl)cc2)c(CBr)o1, CCOC(=O)C(Cl)C(C)=O to produce Cc1nc(-c2ccc(Cl)cc2)c(CC(Cl)C(=O)O)o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.