Two new sesquiterpenoid glycosides from Nicotiana tabacum
2014
Yang, Cai-Yan | Geng, Chang-An | Ma, Yun-Bao | Huang, Xiao-Yan | Zhang, Xue-Mei | Zhou, Jun | Chen, Ji-Jun
Two new sesquiterpenoid glycosides, nicotabalactonecoside (1) and nicotabadiolcoside (2), along with four known terpenoids (3 – 6) were isolated from the leaves of Nicotiana tabacum . The structures of compounds 1 and 2 were determined as dihydrodeacetylphytuberin-2-one 11- O -β- d -glucopyranoside and 1,2-dehydro-4-epieremophil-9-ene-11,12-diol 12- O -β- d -glucopyranoside by extensive spectroscopic analyses (HR-ESI-MS, UV, IR, 1D, and 2D NMR) and chemical method. Compound 1 is an unusual phytuberin-type sesquiterpenoid with a 6/5/5 tricyclic system.
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