Using Cc1ccc(S(=O)(=O)OC[C@@H](O)CCc2cccnc2)cc1, O=C(O)c1ccccc1 to produce Cc1ccc(S(=O)(=O)OC[C@@H](CCc2cccnc2)OC(=O)c2ccccc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.