Using O=N[O-], CCCC[C@]1(O)O[C@H](C(O)N(C(=O)NCCCl)C(C)CC)[C@@H](O)[C@H](O)[C@H]1O to produce CCCC[C@]1(O)O[C@H](C(O)N(C(=O)N(CCCl)N=O)C(C)CC)[C@@H](O)[C@H](O)[C@H]1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.