Using CC(C)(C)C1CCC(Oc2ccc3cc(CCO)ccc3c2)CC1 to produce CC(C)(C)C1CCC(Oc2ccc3cc(CC=O)ccc3c2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.