Using CCOC(=O)C(C)(C)Oc1ccc(C(=O)CSc2cc(C(C)(C)C)c(O)c(C(C)(C)C)c2)cc1 to produce CC(C)(Oc1ccc(C(=O)CSc2cc(C(C)(C)C)c(O)c(C(C)(C)C)c2)cc1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.