Using CC(=O)OCCO, COC(=O)C1OC1(c1ccccc1)c1ccccc1 to produce COC(=O)C(O)C(OCCOC(C)=O)(c1ccccc1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.