Using CCCCCCC=CCc1cccc2c(=O)c(O)c(-c3cc(OC)c(OC)cc3OC)oc12 to produce CCCCCCCCCc1cccc2c(=O)c(O)c(-c3cc(OC)c(OC)cc3OC)oc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.