Using O[C@@H]1C[C@H]2CN(c3ccc(Cl)cn3)CCN2C1, O=C(O)c1ccccc1 to produce O=C(O[C@H]1C[C@H]2CN(c3ccc(Cl)cn3)CCN2C1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.