Using CCOC(=O)c1c2c(n(C)c1C(=O)OC(C)(C)C)-c1nc(N)ncc1CC2 to produce CCOC(=O)c1c2c(n(C)c1C(=O)O)-c1nc(N)ncc1CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.