Using O=C(O)CCCc1c[nH]c2ccccc12, CS(=O)(=O)Nc1ccc2c(c1)OC(CN)CO2 to produce CS(=O)(=O)Nc1ccc2c(c1)OC(CNCCCCc1c[nH]c3ccccc13)CO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.