Using CCOC(=O)Cc1ccc(NC(=O)OC(C)(C)C)cn1 to produce CCOC(=O)C[C@H]1CC[C@@H](NC(=O)OC(C)(C)C)CN1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.