Using Clc1cc(Cl)ncn1, O[C@@H]1C[C@@H](COCc2ccccc2)[C@@H](OCc2ccccc2)C1 to produce Clc1cc(O[C@@H]2C[C@@H](COCc3ccccc3)[C@@H](OCc3ccccc3)C2)ncn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.