Using CCC(C)(C)c1ccc(Oc2ccc(OC)cc2C(=O)OC)c(C(C)(C)CC)c1 to produce CCC(C)(C)c1ccc(Oc2ccc(OC)cc2C(=O)O)c(C(C)(C)CC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.