Using O=C(O)C[C@]12CN(Cc3ccccc3)C[C@H]1c1ccccc12 to produce OCC[C@]12CN(Cc3ccccc3)C[C@H]1c1ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.