Using CC1(C)CN(Cc2ccccc2)CCC1=O, CC(C)(C)OC(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)N1CCC(=O)C(C)(C)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.