Using [BH3-]C#N, CC(C)(C)OC(=O)N1CCN(C(=O)OC(C)(C)C)C2CNCC21 to produce CN1CC2C(C1)N(C(=O)OC(C)(C)C)CCN2C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.