Using O=c1c2ccc(Cl)n2nc(C(O)C2CC2)n1Cc1ccccc1, [N-]=[N+]=[N-] to produce NC(c1nn2c(Cl)ccc2c(=O)n1Cc1ccccc1)C1CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.