Using CS(=O)(=O)Cl, O=C1CCc2cc(O)c(C(=O)CCCl)cc2N1 to produce CS(=O)(=O)Oc1cc2c(cc1C(=O)CCCl)NC(=O)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.