Using CCOC(=O)CN(C(=O)C(C)(C)COCc1ccccc1)c1ccccc1 to produce CC(C)(COCc1ccccc1)C(=O)N(CC(=O)O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.