title: Two novel isosteroid alkaloids from Fritillaria monatha.
abstract: Two new isosteroid alkaloids, N-methyl-22,26-imino-13,22-oxido-5alpha,20alpha-jervine-3beta-ol-6-one, pengbeimine B (1) and N-methyl-22,26-imino-13,22-oxido-5alpha,20beta-jervine-3beta-ol-6-one, pengbeimine D (2) were isolated from the fresh bulbs of Fritillaria monatha Migo. Their structures were determined by spectral methods, and were proved by X-ray diffraction.
authors: Jiangxi University of Traditional Chinese Medicine, Nanchang, China.
authors: Hong-Ning
authors: HN
authors: Liu
authors: Fei
authors: F
authors: Li
authors: Yong-Ming
authors: YM
authors: Luo
authors: Wei-Feng
authors: WF
authors: Zhu
mesh_terms: D000470:Alkaloids / Q000737:chemistry / Q000302:isolation & purification*; D031410:Fritillaria / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D015394:Molecular Structure; D021241:Spectrometry, Mass, Electrospray Ionization; D013055:Spectrophotometry, Infrared; D014961:X-Ray Diffraction
chemical_list: D000470:Alkaloids