Using O=C1CC(c2ccc(O)cc2)Oc2cc(O)cc(O)c21, CC(=O)OC(C)=O to produce CC(=O)Oc1ccc(C2CC(=O)c3c(OC(C)=O)cc(OC(C)=O)cc3O2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.