Using CC(C)(C)OC(=O)N1CCCC1c1ncc(-c2ccc3c(c2)sc2cc(Br)ccc23)[nH]1 to produce CC(C)(C)OC(=O)N1CCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.