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