Using COc1ccc2c(c1)S(=O)(=O)c1c(cc(OC)c(OC(C)=O)c1Br)N2 to produce COc1ccc2c(c1)S(=O)(=O)c1c(cc(OC)c(O)c1Br)N2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.