Using COCOc1ccc(C2=Cc3ccc(OCc4ccccc4)cc3OC2)c(OCc2ccccc2)c1 to produce Oc1ccc(C2=Cc3ccc(OCc4ccccc4)cc3OC2)c(OCc2ccccc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.