Using CCCCc1nc2ccc(C)cc2c(=O)n1Cc1ccc(OC(C(=O)OC)c2ccccc2)cc1 to produce CCCCc1nc2ccc(C)cc2c(=O)n1Cc1ccc(OC(C(=O)O)c2ccccc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.