Using CCCC(CC(=O)OCC)n1c(=O)[nH]c2ccccc21, Cc1cc(C)c2c(CBr)nsc2c1 to produce CCCC(CC(=O)OCC)n1c(=O)n(Cc2nsc3cc(C)cc(C)c23)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.