Li C J, Li Y H, Xiao P G, Mabry T J, Watson W H, Krawiec M
Department of Botany, University of Texas at Austin 78713-7640, USA.
Phytochemistry. 1996 May;42(2):489-94.
A new cycloartane triterpenoid glycoside has been isolated from the rhizomes of Cimicifuge foetida L. The spectroscopic characteristics of the new compound are different from previously described cycloartane triterpenoids because of the loss of the 24-isopropyl group as well as the presence of a 11 beta-OH group. Based on spectroscopic evidence, including a series of 2D-NMR analyses, the structure of the new triterpene is assigned as 24-des-isopropyl-7-ene-23-one-9,19; 16,24-dicycloart-3 beta,11 beta,16 alpha,24 alpha-tetraol 3-O-beta-D-xylopryanoside, named here as neocimiside. The structure of the aglycone of neocimiside was confirmed by X-ray analysis.
从升麻的根茎中分离出一种新的环阿尔廷烷三萜糖苷。由于失去了24-异丙基以及存在11β-OH基团，新化合物的光谱特征与先前描述的环阿尔廷烷三萜不同。基于包括一系列二维核磁共振分析在内的光谱证据，新三萜的结构被确定为24-去异丙基-7-烯-23-酮-9,19；16,24-二环阿尔廷-3β,11β,16α,24α-四醇3-O-β-D-木糖苷，在此命名为新升麻苷。新升麻苷苷元的结构通过X射线分析得到证实。
