Using CCOC(=O)c1cc(C)c(C)n1C(=O)OC(C)(C)C to produce CCOC(=O)[C@@H]1C[C@H](C)[C@H](C)N1C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.