Using CN(COCCCOCc1ccccc1)S(=O)(=O)c1c(Cl)cc(Cl)cc1Cl to produce CN(COCCCO)S(=O)(=O)c1c(Cl)cc(Cl)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.