Sesquiterpene lactones and inositol esters from Arnica angustifolia.

  title={Sesquiterpene lactones and inositol esters from Arnica angustifolia.},
  author={Thomas J{\"u}rgen Schmidt and G{\"u}nter Willuhn and Alois Steigel and Dieter Wendisch},
  journal={Planta medica},
  volume={61 6},
From flowerheads of Arnica angustifolia ssp. attenuata nine helenanolides, two 1,5- trans-guaianolides, and a mixture of inositol-tetraesters were isolated. Five of the helenanolides are described for the first time. One of them, 4- O-tigloylarnicalpin, is the first 7(12),6-trans-lactonized pseudoguaianolide isolated from a natural source. The occurrence of… CONTINUE READING