Using CCCCCCC(C)(C)c1cc(O)c2c(c1)oc(=O)c1ccc(OC)cc12 to produce CCCCCCC(C)(C)c1cc(O)c2c(c1)oc(=O)c1ccc(O)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.