Using [BH3-]C#N, C[C@H]1CNCCN1c1ccc2[nH]c(-c3n[nH]c4cc(Cl)ccc34)nc2c1 to produce C[C@H]1CN(C)CCN1c1ccc2[nH]c(-c3n[nH]c4cc(Cl)ccc34)nc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.