Using CCCCCCCCCCc1ccc2c(=O)c(OC)c(-c3cc(OC)c(OC)cc3OC)oc2c1 to produce CCCCCCCCCCc1ccc2c(=O)c(O)c(-c3cc(O)c(O)cc3O)oc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.