Using COC(=O)[C@@H]1C[C@H](O)C(=O)[C@@H]2[C@@]3(C)C[C@@H](c4ccoc4)OC(=O)[C@H]3CC[C@]21C, O=C=Nc1ccccc1 to produce COC(=O)[C@@H]1C[C@H](OC(=O)Nc2ccccc2)C(=O)[C@H]2[C@@]1(C)CC[C@H]1C(=O)O[C@H](c3ccoc3)C[C@]21C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.