Using CC(Br)C(=O)c1ccc2c(c1)CN(C)C(=O)N2, CC(=O)[O-] to produce CC(=O)OC(C)C(=O)c1ccc2c(c1)CN(C)C(=O)N2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.