Using CCOC(=O)C(Nc1ncnc2ccc(Cl)cc12)c1ccc2c(c1)OCO2 to produce OCC(Nc1ncnc2ccc(Cl)cc12)c1ccc2c(c1)OCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.