Using NO, COc1ccc(C[C@@H]2CN(C(=O)OC(C)(C)C)CCO2)cc1C=O to produce COC1=CC=C(C[C@@H]2CN(C(=O)OC(C)(C)C)CCO2)CC1=NO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.