Using CCOC(=O)[C@@H](OC(C)(C)C)c1c(C)cc2nc(Br)sc2c1-c1ccc(Cl)cc1, OB(O)c1ccc2nc[nH]c2c1 to produce CCOC(=O)[C@@H](OC(C)(C)C)c1c(C)cc2nc(-c3ccc4nc[nH]c4c3)sc2c1-c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.