Using CCOCC(COS(C)(=O)=O)NC(=O)OC(C)(C)C, [N-]=[N+]=[N-] to produce CCOCC(CN=[N+]=[N-])NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.