Using O=C(C[C@]1(c2ccc(-c3ccc(-c4cnco4)cc3)s2)CCN(C(=O)c2ccccn2)CCS1(=O)=O)NO to produce O=C(CC1(c2ccc(-c3ccc(-c4cnco4)cc3)s2)CCN(C(=O)c2ccccn2)CCS1(=O)=O)NO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.