Using CC(C)(C)c1ccc(O)c(C(C)(C)C)c1, O=C(O)COc1ccc(C(O)C(=O)O)cc1 to produce CC(C)(C)c1cc2c(c(C(C)(C)C)c1)OC(=O)C2c1ccc(OCC(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.