Using CC(=O)Oc1ccc(OC(C)=O)c(-c2ccc(C(Br)Br)cc2)c1, CC(=O)[O-] to produce O=Cc1ccc(-c2cc(O)ccc2O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.