Using COC1=CC(=O)C(OC)=C(CCCCCC2=C(OC)C(=O)C=C(OC)C2=O)C1=O to produce O=C1C=C(O)C(=O)C(CCCCCC2=C(O)C(=O)C=C(O)C2=O)=C1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.