Six new 14-noreudesmane sesquiterpenoids, nicotabacosides A-F (1-6), along with five known sesquiterpenoids (7-11), were isolated from the leaves of Nicotiana tabacum. The structures of compounds 1-6 were elucidated as isorishitin 3-O-beta-D-glucopyranoside (1), rishitin 3-O-beta-D-glucopyranoside (2), rishitin 2-O-beta-D-glucopyranoside (3), 1, 6-dehydro-rishitin 3-O-beta-D-glucopyranoside (4), 2-hydroxyl-ligudentato 3-O-beta-D-glucopyranoside (5) and oxyglutinosone 3-O-beta-D-glucopyranoside (6) based on extensive spectroscopic analyses (HRESIMS, UV, IR, 1D and 2D NMR). Their absolute configurations were determined by X-ray single-crystal diffraction and comparison of their electronic circular dichroism (ECD) spectra. (C) 2014 Elsevier B.V. All rights reserved.
1.Chinese Acad Sci, Kunming Inst Bot, State Key Lab Phytochem & Plant Resources West Ch, Kunming 650201, Yunnan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation:
Yang,Cai-Yan;Geng,Chang-An;Huang,Xiao-Yan;Wang,Hao;Xu,Hong-Bo;Liang,Wen-Juan;Ma,Yun-Bao;Zhang,Xue-Mei;Zhou,Jun;Chen,Ji-Jun.Noreudesmane sesquiterpenoids from the leaves of Nicotiana tabacum,FITOTERAPIA,2014,96():81-87
