Using CCOC(=O)c1c(N2C(=O)c3ccccc3C2=O)sc(C)c1CCc1ccc(Br)cc1 to produce Cc1sc(N2C(=O)c3ccccc3C2=O)c(C(=O)O)c1CCc1ccc(Br)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.