Using CC(C)(C)OC(=O)N(Cc1cc2c(nn1)OCCO2)C1CCN(C(=O)OCc2ccccc2)CC1 to produce CC(C)(C)OC(=O)N(Cc1cc2c(nn1)OCCO2)C1CCNCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.