Using COc1cc2c(c3c1cc(C(C)=O)n3Cc1ccccc1)CCCC2 to produce COc1cc2c(c3c1cc(C(C)O)n3Cc1ccccc1)CCCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.