Using COC(=O)c1c(NS(=O)(=O)c2ccccc2)ccc2ncccc12 to produce O=C(O)c1c(NS(=O)(=O)c2ccccc2)ccc2ncccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.