Using CCOC(=O)c1[nH]c2c(NS(=O)(=O)c3cccs3)cccc2c1C to produce Cc1c(C(=O)O)[nH]c2c(NS(=O)(=O)c3cccs3)cccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.