Using Nc1nc(N)c2cc(CNc3ccc(C(=O)N[C@@H](CCC(=O)O)C(=O)O)cc3)cnc2n1, [BH3-]C#N to produce CN(Cc1cnc2nc(N)nc(N)c2c1)c1ccc(C(=O)NC(CCC(=O)O)C(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.