Using O=C(CBr)OCc1ccccc1, O=C([O-])Cc1ccccc1Nc1c(Cl)cccc1Cl to produce CC(=O)OOC(=O)Cc1ccccc1Nc1c(Cl)cccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.