Using COC(=O)CCCN1CCN(Cc2ccccc2)CC1, CC(C)(C)OC(=O)NCCCC=O to produce COC(=O)CCCN1CCN(CCCNC(=O)OC(C)(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.