Using Cc1cccnc1CN(CCCN)C(C)c1ccccn1, O=C(O)c1ccc(O)nc1 to produce Cc1cccnc1CN(CCCNC(=O)c1ccc(O)nc1)C(C)c1ccccn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.