Using CCCCC(Sc1cc(C(C)(C)C)c(O)c(C(C)(C)C)c1)C(=O)OCC to produce CCCCC(Sc1cc(C(C)(C)C)c(O)c(C(C)(C)C)c1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.