Using COc1ccc(Br)c(-n2c(=O)[nH]c(=O)n(C)c2=O)c1 to produce Cn1c(=O)[nH]c(=O)n(-c2cc(O)ccc2Br)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.