Using CC1=C(/C=C/C(C)=C/C=C/C(C)=C\C(=O)O)C(C)(C)C(=O)CC1 to produce CC1=C(/C=C/C(C)=C/C=C/C(C)=C\C(=O)O)C(C)(C)C(O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.