Using CC(C)(C)OC(=O)Nc1ccccc1NC(=O)c1cc2cc(OC(=O)c3ccccc3)ccc2s1 to produce CC(C)(C)OC(=O)Nc1ccccc1NC(=O)c1cc2cc(O)ccc2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.