Using CCOC(=O)CBr, Cc1sc2[nH]c(=O)n(Cc3ccc(Cl)cc3)c(=O)c2c1C to produce CCOC(=O)Cn1c(=O)n(Cc2ccc(Cl)cc2)c(=O)c2c(C)c(C)sc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.