Using C=CCC1=C(CC[C@](C)(O)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)C(=O)C(C)=C(C)C1=O to produce CCCC1=C(CC[C@](C)(O)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)C(=O)C(C)=C(C)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.