Using CC(=O)OC(c1cc2n(n1)CCOC2)C1(Br)C(=O)N2C(C(=O)OCc3ccc([N+](=O)[O-])cc3)=CS[C@@H]21 to produce O=C(O)C1=CS[C@@H]2/C(=C\c3cc4n(n3)CCOC4)C(=O)N12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.