Using CCc1cc2cc(S(C)(=O)=O)cc(-c3cn(C)c(=O)c4ccccc34)c2o1 to produce CCC1Cc2cc(S(C)(=O)=O)cc(-c3cn(C)c(=O)c4ccccc34)c2O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.