Using CC(C)=CCC/C(C)=C/CC/C(C)=C/CC/C(C)=C/CO to produce CC(C)=CCC/C(C)=C/CC/C(C)=C/CC/C(C)=C/C=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.