Using CCOc1c(Nc2ccc3ncnc(Nc4cccc(Br)c4)c3c2)c(=O)c1=O, [NH4+] to produce Nc1c(Nc2ccc3ncnc(Nc4cccc(Br)c4)c3c2)c(=O)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.