Using CC(=O)Oc1cccc(C(=O)c2c[nH]c3ncc(Br)cc23)c1C to produce Cc1c(O)cccc1C(=O)c1c[nH]c2ncc(Br)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.