Using CC(C)(C)OC(=O)C[C@]1(CN)C[C@]2(C)CC=C[C@@H]21 to produce C[C@@]12CC=C[C@H]1[C@](CN)(CC(=O)O)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.