Using COC(=O)C(C(=O)Cc1ccccc1)C1c2ccccc2C(=O)N1c1ccc2ccc(Cl)nc2n1 to produce O=C(Cc1ccccc1)CC1c2ccccc2C(=O)N1c1ccc2ccc(Cl)nc2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.