Using COC(=O)c1ccc(Br)c2[nH]c3c(c(=O)c12)CCN(Cc1ccccc1)C3 to produce COC(=O)c1cccc2[nH]c3c(c(=O)c12)CCN(Cc1ccccc1)C3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.