Using CCOC(=O)C(OC)c1nn(-c2ccc(Cl)cc2)c2c1CCCC2 to produce COC(C(=O)O)c1nn(-c2ccc(Cl)cc2)c2c1CCCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.