9Hirayama F, Namiki C, Sagara K, et al. Determination of Lupin Alkaloids and Pterocarpans in Sophora Root by HPLC[J]. Nat Med, 1995,49(3):317-321.
10Yamamoto K, Arimoto K, Iwata Y, et al. Analysis of Matrine, Matrine N-Oxide and Sophocarpine N-Oxide in Sophora Root ""Kushen""[J]. Nat Med, 1994,48(3):180-184.