Using CCCCc1nc2ccccc2n1C(C)c1ccc(OC(C(=O)OCC)c2ccccc2)cc1 to produce CCCCc1nc2ccccc2n1C(C)c1ccc(OC(C(=O)O)c2ccccc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.