Using CC(C)(C)c1ccccc1, CC(C)(C)c1ccc2c(c1)C(=O)OC2=O to produce CC(C)(C)c1ccc(C(=O)O)c(C(=O)c2ccccc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.