Using ClCCl, CCOC(CN(Cc1ccc2c(c1OC)OCO2)S(=O)(=O)c1ccc(C)cc1)OCC to produce COc1c(CN(C)CC(OC)OC)ccc2c1OCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.