1. S. Shibata and Y. Nishikawa, Studies on the constituents of Japanese and Chinese crude drugs. V. On the constituents of the root of Sophora suhprostrata, J. Pharm. Soc. Japan 81, 1635–1639 (1961).
2. S. Ohmiya et al., The alkaloid constituents of Euchresta japonica and the stereochemical assignment of two isomeric sophoridine N-oxides, Chphbul
28, 546–551 (1980).
3. S. Ohmiya et al., (+)-5,17-Dehydromatrine N-oxide, a new alkaloid of Euchresta japonica, Phychem
17, 2021–2022 (1978).
4. S. Ohmiya et al, (-)-12-Cytisineacetic acid, a new lupin alkaloid in Euchresta japonica, Phychem
18, 649–650 (1979).
5. Y. Shirataki et al., Studies on the constituents of Sophora species. Xvi. Constituents of the root of Euchresta japonica, Chphbul 29, 3033–3036 (1981).