Using COc1ccc(-c2nc(SCCBr)sc2-c2ccc(OC)cc2)cc1, [OH-] to produce COc1ccc(-c2nc(SCCO)sc2-c2ccc(OC)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.