Using CCOC(=O)c1c(C(C)C)nc2ccc(Cl)cc2c1Cc1ccccc1OC to produce COc1ccccc1Cc1c(C(=O)O)c(C(C)C)nc2ccc(Cl)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.