Alkaloids of the Amaryllidaceae. A new alkaloid, sanguinine from Lycoris sanguinea Maxim. var. Kiushiana Makino, and pretazettine from Lycoris radiata Herb - Kobayashi,S.; Takeda,S.; Ishikawa,H.; Matsumoto,H.; Kihara,M.; Shingu,T.; Numata,A.; Uyeo,S. (Chemical and Pharmaceutical Bulletin, 1976)