Using COC(=O)c1c(-c2ccccc2)c2cc(Br)ccc2c(=O)n1CC1CCCCN1C(=O)OC(C)(C)C to produce COC(=O)c1c(-c2ccccc2)c2cc(Br)ccc2c(=O)n1CC1CCCCN1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.