Using O=C1c2ccccc2C(=O)c2cc(CCl)ccc21, [N-]=[N+]=[N-] to produce [N-]=[N+]=NCc1ccc2c(c1)C(=O)c1ccccc1C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.