Using COc1cnc(-n2cnc(C)n2)c2[nH]cc(C(=O)C(=O)O)c12, Brc1cccc2c1CCNC2 to produce COc1cnc(-n2cnc(C)n2)c2[nH]cc(C(=O)C(=O)N3CCc4c(Br)cccc4C3)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.