Using Cc1cn([C@@H]2O[C@@]3(COS(C)(=O)=O)CO[C@@H]2[C@@H]3OCc2ccccc2)c(=O)[nH]c1=O to produce Cc1cn([C@@H]2O[C@@]3(COS(C)(=O)=O)CO[C@@H]2[C@@H]3O)c(=O)[nH]c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.