Using Cc1c(Cl)cccc1S(=O)(=O)Nc1nc(CCCNCCO)cs1, O=C(Cl)CCl to produce Cc1c(Cl)cccc1S(=O)(=O)Nc1nc(CCCN2CCOCC2=O)cs1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.