Using COc1ccc2c3ccccc3c3c(OC)c(OC)c(OC)c(OC)c3c2c1OC to produce Oc1ccc2c3ccccc3c3c(O)c(O)c(O)c(O)c3c2c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.