Using C=CCc1c(O)c(C(C)=O)cc2c1OCc1cc(OC)ccc1C2=O to produce COc1ccc2c(c1)COc1c(cc(C(C)=O)c3c1CC(C)O3)C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.