Using CC(C)c1nc2c(n1Cc1ccc(Cl)c(Cl)c1)C(=O)CCCC2 to produce CC(C)c1nc2c(n1Cc1ccc(Cl)c(Cl)c1)C(O)CCCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.