Using CCOC(=O)c1nc2c(=O)[nH]c3cc(S(C)(=O)=O)ccc3n2c1C to produce Cc1c(C(=O)O)nc2c(=O)[nH]c3cc(S(C)(=O)=O)ccc3n12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.