![](http://www.alamy.com/thumbs/6/8C2E24E8-7CED-41E3-9554-EB9C006B5A46/2K988D3.jpg)
3D image of Betulin skeletal formula - molecular chemical structure of bark of birch trees triterpene isolated on white background
Size: 8034px × 5076px
Photo credit: © Kseniya-Omega / Alamy / Afripics
License: Royalty Free
Model Released: No
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