Using COC(=O)c1ccc(C(S)c2nc3cc(OC)ccc3[nH]2)cc1 to produce COc1ccc2[nH]c(C(S)c3ccc(C(=O)O)cc3)nc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.