Five new withanolides from Tacca plantaginea.

@article{Liu2006FiveNW,
  title={Five new withanolides from Tacca plantaginea.},
  author={Hai-Yang Liu and Wei Ni and Bai-bo Xie and Ling-Yun Zhou and Xiao-Jiang Hao and Xin Wang and Chang-xiang Chen},
  journal={Chemical & pharmaceutical bulletin},
  year={2006},
  volume={54 7},
  pages={992-5}
}
Five new withanolides named plantagiolides A-E (1, 3-6), together with a known withanolide glucoside, chantriolide A (2) were isolated from the whole plants of Tacca plantaginea (HANCE). Their structures were elucidated by means of spectroscopic methods including extensive 1D and 2D-NMR techniques. 

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Colorless needles from chloroform

  • C Plantagiolide

White amorphous powder . mp 253 — 255 ° C . [ a ] D 26  65 . 2 ° ( c  2 . 6 , CHCl 3 )

  • A Plantagiolide, B Plantagiolide

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