Using CC(C)(CCl)Cn1cc(C=O)c2cc(Br)ccc2c1=O, CC(=O)[O-] to produce CC(=O)OCC(C)(C)Cn1cc(C=O)c2cc(Br)ccc2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.