Using COc1c(OC)c(OC)c2c(=O)cc(-c3ccc(OCc4ccccc4)c(OCc4ccccc4)c3)oc2c1OC to produce COc1c(OC)c(OC)c2c(=O)cc(-c3ccc(O)c(O)c3)oc2c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.