Using CCS(=O)(=O)N(C)c1nc(C(=O)OC)c(O)c2ncccc12 to produce CCS(=O)(=O)N(C)c1nc(C(=O)O)c(O)c2ncccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.