Using Brc1ccccn1, CCC(=O)c1ccc2[nH]c(-c3n[nH]c4ccsc34)cc2c1 to produce CCC(O)(c1ccc2[nH]c(-c3n[nH]c4ccsc34)cc2c1)c1ccccn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.