AnO-to-Nintramolecular acyl migration in C19-diterpenoid alkaloids
摘要:
The O-acyl group at C-1 of two C-19-diterpenoid alkaloids 2 and 5 was transferred to the secondary amine nitrogen to form amides 3 and 6 in the basic condition. This kind of O-to-N intramolecular acyl migration could be caused by the near distance between the nucleophilic nitrogen atom and the carbonyl group of the ester at C-1 in the C-19-diterpenoid alkaloids, which is consistent with the conformation of rings A and E in the C-19-diterpenoid alkaloids.
Unprecedented C 19 -diterpenoid alkaloid glycosides from an aqueous extract of “fu zi”: Neoline 14- O - l -arabinosides with four isomeric l -anabinosyls
作者:Xian-Hua Meng、Qing-Lan Guo、Cheng-Gen Zhu、Jian-Gong Shi
DOI:10.1016/j.cclet.2017.04.026
日期:2017.8
alkaloid glycosides with isomeric arabinosyls, named aconicarmichosides A–D (1–4), were isolated from an aqueous extract of “fu zi”, the lateral roots of Aconitum carmichaelii. Their structures were determined as neoline 14-O-α- and 14-O-β- l -arabinopyranosides (1 and 2) and 14-O-α- and 14-O-β- l -arabinofuranosides (3 and 4), by spectroscopic and chemical methods including 2D NMR experiments and acid
摘要从腐殖假单胞菌侧根“ fu zi”的水提物中分离出四个结构上前所未有的乌头烷型C19-二萜类生物碱与异构阿拉伯糖基,命名为aconicarmichosides A–D(1-4)。它们的结构被确定为新的14-O-α-和14-O-β-1-阿拉伯吡喃糖苷(1和2)和14-O-α-和14-O-β-1-阿拉伯呋喃糖苷(3和4),通过光谱和化学方法,包括2D NMR实验和酸水解。化合物1-4是糖苷二萜生物碱的第一个实例。
Application of Liquid Chromatography-Atmospheric Pressure Chemical Ionization Mass Spectrometry to the Differentiation of Stereoisomeric C19-Norditerpenoid Alkaloids.
作者:Koji WADA、Takao MORI、Norio KAWAHARA
DOI:10.1248/cpb.48.660
日期:——
High-performance liquid chromatography-atmospheric pressure chemicalionizationmassspectrometry (HPLC-APCI-MS) was successfully applied to stereoisomeric C19-norditerpenoid alkaloids at position 1. APCI-MS allowed the easy and precise control of the energy deposition by varying the drift voltage. Comparison of the breakdown curves, observed by changing the potential difference between the first electrode
Norditerpenoid Alkaloids from the Processed Tubers of Aconitum carmichaeli
作者:Sang Hee Shim、Ju Sun Kim、Sam Sik Kang
DOI:10.1248/cpb.51.999
日期:——
new and five known norditerpenoidalkaloids were isolated from the processed tubers of Aconitum carmichaeli. The new alkaloids are 14-O-cinnamoylneoline (3), 14-O-anisoylneoline (4) 14-O-veratroylneoline (5), and lipo-14-O-anisoylbikhaconine (8). The known alkaloids are neoline (1), 14-O-acetylneoline (2), foresaconitine (6), crassicauline A (7), and lipohypaconitine (9). Alkaloids 2, 6, and 7 were isolated
The present invention relates to an evaporation apparatus capable of supplying active ingredients sufficiently and stably. One embodiment of the invention comprises a retention vessel keeping a liquid formulation which contains active ingredients, a liquid absorbing mechanism which absorbs the liquid formulation from said retention vessel, an evaporation mechanism which evaporates active ingredients of said liquid formulation absorbed into said liquid absorbing mechanism and adjusting means which adjusts the evaporation of active ingredients.
NOVEL ACONITINE COMPOUND AND ANALGESIC/ANTIINFLAMMATORY AGENT
申请人:SANWA SHOYAKU KABUSHIKI KAISHA
公开号:EP0564648A1
公开(公告)日:1993-10-13
A novel aconitine compound represented by general formula (I) and analgesic/antiinflammatory agent containing said compound or its salt as the active ingredient; wherein each symbol is as defined in the text of specification.