1Weijie zhao, Yasuhiro Tezuka, Tohru Kikuchi, et al. Studies on the Constituents of Veratnma Plants. Ⅱ. Constituents of Veratrum nigrum L. vat. ussuriense. ( 1 ). Structure and ^1H-and ^13C-Nuclear Magnetic Resonance Spectra of a New Alkahid,Verussutinine and Related Alkaloids. Chem Pharm Bull, 1991,39(3) :549.
2Bohlmann F. Zum Konfigurationsbestimmung yon Chinolizidin Derivaten. Lupinen-Alkaloide Ⅷ. Chem Ber, 1958,91:2157.
3Budzikiewicz H. Zum Massenspektroskopischen Fragmentie-Rungsverhalten yon Steroidalkaloiden. Tetrahedron, 1964,20:2267.
4Kupchcan S M. Veratnma Alkaloids. XXIX. The Structures of Germitrine, Neogermitrine and Several Related Hypotensive Ester Alkaloids. J Am Chem Soc, 1959,20:1921.
5Gilbertson T J. Zygadne and Zygadenine: The Major Alkaloids from Zygadenus gramineus. Phytochemistry, 1973,20:2079.
