Using CC(C)(C)OC(=O)N1CCOC(CN2C(=O)c3ccccc3C2=O)(c2ccc(Cl)c(Cl)c2)CC1 to produce CC(C)(C)OC(=O)N1CCOC(CN)(c2ccc(Cl)c(Cl)c2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.