Using CC(=O)O[C@@H]1[C@H]2[C@H]3[C@H]([C@H](OC(C)=O)[C@H](OC(C)=O)[C@]2(C)[C@@H]2[C@@H]1[C@]1(C)C(=C[C@H]2C)OC(=O)[C@@]1(C)O)[C@]1(C)[C@H](C[C@@H]2O[C@@H]2[C@@H]1OC(C)=O)C(=O)[C@@H]3O to produce CC(=O)O[C@H]1[C@H]2[C@H]([C@@H]3[C@@H](O)[C@@H]4[C@H]([C@H](C)C=C5OC(=O)[C@@](C)(O)[C@@]54C)[C@@]3(C)[C@H]1OC(C)=O)[C@@H](O)C(=O)[C@H]1C[C@@H]3O[C@@H]3[C@H](OC(C)=O)[C@]21C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.