Using CC(C)(C)OC(=O)C(Cc1ccccc1)(Cc1cccc2ccccc12)C(=O)OC(C)(C)C to produce O=C(O)C(Cc1ccccc1)Cc1cccc2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.