Using COC(=O)c1ccc2c(C(C)(C)O)nn(-c3ccsc3)c2c1 to produce CC(C)(O)c1nn(-c2ccsc2)c2cc(C(=O)O)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.