Using BrCC1CCCO1, CC(=O)SC(C)(C)C(=O)Nc1cc(C(C)(C)C)on1 to produce CC(C)(SCC1CCCO1)C(=O)Nc1cc(C(C)(C)C)on1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.