Using Cc1ccc2ccc3c(c2c1)C(C)(C)C(=O)O3, O=C1CCC(=O)N1Br to produce CC1(C)C(=O)Oc2ccc3ccc(CBr)cc3c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.