Using O=Cc1ccncc1, CCN1C(=O)C(C)(C)C(=O)N(C)c2cc(CCN)ccc21 to produce CCN1C(=O)C(C)(C)C(=O)N(C)c2cc(CCNCc3ccncc3)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.