Using CC(C)(C)OC(=O)N1CCC(NN2CCN(C(=O)OCc3ccccc3)CC2=O)CC1 to produce CC(C)(C)OC(=O)N1CCC(NN2CCNCC2=O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.