Using Cc1nn(C(=O)OC(C)(C)C)cc1B1OC(C)(C)C(C)(C)O1, O=c1[nH]c(-c2ccccc2Cl)nc2cc(Br)sc12 to produce Cc1[nH]ncc1-c1cc2nc(-c3ccccc3Cl)[nH]c(=O)c2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.