Using O=C=Nc1ccccc1, NCCc1cccc(-c2nc(=O)c3ccccc3s2)n1 to produce O=C(NCCc1cccc(-c2nc(=O)c3ccccc3s2)n1)Nc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.