Using O=C(O)C=Cc1cccnc1, CC(C)(C)OC(=O)N1CCN(CCN)CC1 to produce CC(C)(C)OC(=O)N1CCN(CCNC(=O)C=Cc2cccnc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.