Using CN(CC(=O)NN=C1CCN(c2ccncc2)CC1)C(=O)OC(C)(C)C to produce CN(CC(=O)NNC1CCN(c2ccncc2)CC1)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.