Using CC(C)(C)c1cc(C=O)cc(C(C)(C)C)c1O, CN1OCC(Br)C1=O to produce CN1OCC(C(O)c2cc(C(C)(C)C)c(O)c(C(C)(C)C)c2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.