Using COCOCCc1c(OC)c(OCOC)c(CCCCCc2c(OCOC)c(OC)c(OC)c(OCOC)c2OC)c(OC)c1OCOC to produce CCCCCC1=C(OC)C(=O)C(CCO)=C(OC)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.