Using CCOC(=O)CBr, O=C1c2ccccc2C(=O)N1c1cc(S(=O)(=O)N2CCCCc3ccccc32)c(O)cc1Cl to produce CCOC(=O)COc1cc(Cl)c(N2C(=O)c3ccccc3C2=O)cc1S(=O)(=O)N1CCCCc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.