Using CCS[C@@H]1O[C@H](C)[C@H](O)[C@H](O)[C@H]1OCc1ccccc1, O=C(Cl)c1ccccc1 to produce CCS[C@@H]1O[C@H](C)[C@H](O)[C@H](OC(=O)c2ccccc2)[C@H]1OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.