Using COc1c(S(C)(=O)=O)ccc(C(=O)O)c1C, Cn1nccc1O to produce COc1c(S(C)(=O)=O)ccc(C(=O)c2cnn(C)c2O)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.