Using CC(C)(C)OC(=O)N1CC2CCC1CC2=Cc1ccc(Cl)c(Cl)c1 to produce CC(C)(C)OC(=O)N1CC2CCC1CC2Cc1ccc(Cl)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.