Studies on Chemical Constituents of Fritillaria in Hubei(Ⅻ)--X-Ray Determination of Stereo-Structure of Ebeiensine

Abstract

Abstract: The ebeiensine was isolated from the bulb of Fritillaria ebeiensis G.D.Yu et G.Q.Ji and Fritillaria ,ebeiensis var.purpurea G. D. Yu et P. Li.The result of the complete X-ray structural analysis shows that ebeiensine with the molecular formula C₂₇H₄₁NO₃·H₂O, belongs to the rhombic system with space group P2₁2₁2₁, and the lattice parameters are as follows- a=0.6952(2) nm, b=1.5150(2) nm, c=2.5359(7) nm, 7=2.53260×10^-27 m³, Z=4, R=0.055.Ebeiensine has an 11-deoxo-5,6-dihydrojervanine heterocyclic skeleton and a stereochem-ical structure of 5a, 14α,20β-jervanine-3β-hydroxy-6-one.At the same time, C₁₇—O—C₂₃ was confirmed as β-configuration.

Key words: Fritillaria in Hubei, Ebeibeimu, X-Ray diffraction

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WU Ji-zhou, SHENG Liao-rong, LUO Bao-sheng. Studies on Chemical Constituents of Fritillaria in Hubei(Ⅻ)--X-Ray Determination of Stereo-Structure of Ebeiensine[J]. Chem. J. Chinese Universities, 1992, 13(5): 658.

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Studies on Chemical Constituents of Fritillaria in Hubei(Ⅻ)--X-Ray Determination of Stereo-Structure of Ebeiensine

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