Using C=C(C)CN1C(=O)[C@@H](NC(=O)OC(C)(C)C)C[C@@H](c2ccccc2)[C@H]1C to produce CC(C)CN1C(=O)[C@@H](NC(=O)OC(C)(C)C)C[C@@H](c2ccccc2)[C@H]1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.