Using COC(=O)C(=O)c1c(-c2ccc3c(c2)CCCO3)c(Br)nn1C to produce COC(=O)C(O)c1c(-c2ccc3c(c2)CCCO3)c(Br)nn1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.