Using O=C(CCl)c1ccc(O)c2[nH]c(=O)sc12, [N-]=[N+]=[N-] to produce [N-]=[N+]=NCC(=O)c1ccc(O)c2[nH]c(=O)sc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.