Using C=C(C)[C@H]1Cc2c(ccc3c2O[C@@H]2COc4cc(OC)c(OC)cc4[C@@H]2C3=O)O1 to produce C=C(C)[C@H]1Cc2c(ccc(C(=O)C3CCOc4cc(OC)c(OC)cc43)c2O)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.