Using COc1cc(OC)nc(S(C)(=O)=O)n1, Cc1cccc(S)c1C(=O)O to produce COc1cc(OC)nc(Sc2cccc(C)c2C(=O)O)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.