Using CCOC(=O)c1ccc(/C=C/c2ccc(C34CC5CC(CC(C5)C3)C4)c(O)c2)cc1 to produce O=C(O)c1ccc(/C=C/c2ccc(C34CC5CC(CC(C5)C3)C4)c(O)c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.