Using Cn1cc(NC(=O)OC(C)(C)C)c(N2CC(CO)C(C)(C)C2=O)n1 to produce Cn1cc(NC(=O)OC(C)(C)C)c(N2CC(C=O)C(C)(C)C2=O)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.