Using OCc1ccccc1, CCC(C)(C)C(=O)C(=O)N1CCC[C@H]1C(=O)O to produce CCC(C)(C)C(=O)C(=O)N1CCC[C@H]1C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.