Using COC[C@]12CN(C)C3[C@@H]4[C@H](OC)[C@H]1[C@@]3([C@@H](OC)C[C@H]2O)[C@@H]1C[C@@]2(O)[C@H](OC(=O)c3ccccc3)[C@@H]1[C@]4(OC(C)=O)[C@@H](O)[C@@H]2OC to produce COC[C@]12CN(C)[C@@H]3[C@@H]4[C@H](OC)[C@H]1[C@@]3([C@@H](OC)C[C@H]2O)[C@@H]1C[C@@]2(O)[C@H](O)[C@@H]1[C@]4(O)[C@@H](O)[C@@H]2OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.