Using CCOC(=O)COc1c(F)cc(SCCNS(=O)(=O)c2ccccc2)cc1F to produce O=C(O)COc1c(F)cc(SCCNS(=O)(=O)c2ccccc2)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.