Using O=C(O)C1CCN(Cc2cc(Br)cc3[nH]c(=O)c(=O)[nH]c23)CC1, Nc1ccccc1 to produce O=C(Nc1ccccc1)C1CCN(Cc2cc(Br)cc3[nH]c(=O)c(=O)[nH]c23)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.