Using CC(=O)OC(C)=O, CC(=O)OC[C@H]1O[C@@H](c2cccc(Cc3cc4cccccc-4c3)c2)[C@H](OC(C)=O)[C@@H](OC(C)=O)[C@@H]1OC(C)=O to produce CC(=O)OC[C@H]1O[C@@H](c2cccc(Cc3cc4cccccc-4c3C(C)=O)c2)[C@H](OC(C)=O)[C@@H](OC(C)=O)[C@@H]1OC(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.