Using CC(=O)OC(C)=O, O=Cc1cccc2cc3c(cc12)C(O)OC3=O to produce CC(=O)OC1OC(=O)c2cc3cccc(C=O)c3cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.