Using [Br-], Cc1ccc(S(=O)(=O)OCCC2(C)OCCc3nc(-c4ccccc4)sc32)cc1 to produce CC1(CCBr)OCCc2nc(-c3ccccc3)sc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.