Using COc1cc(CC(=O)c2ccc3c(c2)C=CC(C)(C)O3)cc(OC)c1OCc1ccccc1 to produce COc1cc(CC(=O)c2ccc3c(c2)CCC(C)(C)O3)cc(OC)c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.