Redirect Notice
The previous page is sending you to
https://www.semanticscholar.org/paper/An-unusual-caffeic-acid-derived-bicyclic-%5B2.2.2%5D-Vale-David/05fa37e73fb8ee131af955d592fbf419c49d1e38/figure/1
.
If you do not want to visit that page, you can
return to the previous page
.