Using CC(=O)OC(c1cc2n(n1)CSCC2)C1(Br)C(=O)N2C(C(=O)OCc3ccc([N+](=O)[O-])cc3)=CS[C@@H]21, C1CCOC1 to produce CCOC(=O)c1cc2n(n1)CSCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.