Using COC(=O)C[C@@H]1COc2cc(O)ccc21, Cc1cc(OCCCS(C)(=O)=O)cc(C)c1-c1cccc(CO)c1 to produce COC(=O)C[C@@H]1COc2cc(OCc3cccc(-c4c(C)cc(OCCCS(C)(=O)=O)cc4C)c3)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.