Using CC(C)Br, O=C(O)c1ccc2c(c1)CCc1ccc(O)cc1C2=O to produce CC(C)Oc1ccc2c(c1)C(=O)c1ccc(C(=O)O)cc1CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.