Using CS(=O)(=O)Oc1ccc(CCCCS(=O)(=O)[O-])cc1, CCOC(=O)C(Cc1cccc(O)c1)OCC to produce CCOC(=O)C(Cc1cccc(OCCCc2ccc(OS(C)(=O)=O)cc2)c1)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.