Using CCOC(=O)C1CCc2c([nH]c3c(C(N)=O)ccc(Br)c23)C1 to produce CCOC(=O)c1ccc2c(c1)[nH]c1c(C(N)=O)ccc(Br)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.