Using CCc1ccc(CCO)nc1, O=C(Oc1cccc(O)c1)c1ccccc1 to produce CCc1ccc(CCOc2cccc(OC(=O)c3ccccc3)c2)nc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.