Using C[C@@H]1C[C@H]2[C@@H]3C[C@H](F)C4=CC(=O)CC[C@]4(C)[C@H]3CC[C@]2(C)[C@H]1C(=O)C(=O)O to produce C[C@@H]1C[C@H]2[C@@H]3C[C@H](F)C4=CC(=O)C=C[C@]4(C)[C@H]3CC[C@]2(C)[C@H]1C(=O)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.