Using Cc1cccc(Nc2nccc(-c3ccc(N)s3)n2)c1, O=C(O)c1ccccc1 to produce Cc1cccc(Nc2nccc(-c3ccc(NC(=O)c4ccccc4)s3)n2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.