Using CC(=O)O, O=C(O)CC1c2ccccc2-c2c1c1ccccc1c1ccccc21 to produce OCC1c2ccccc2-c2c1c1ccccc1c1ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.