Using OC[C@H]1O[C@@H](c2ccc(Cl)c(Cc3ccc4c(c3)N(Cc3ccccc3)CC3(CC3)O4)c2)[C@H](O)[C@@H](O)[C@@H]1O to produce OC[C@H]1O[C@@H](c2ccc(Cl)c(Cc3ccc4c(c3)NCC3(CC3)O4)c2)[C@H](O)[C@@H](O)[C@@H]1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.