Tropane alkaloids are a class of alkaloids and secondary metabolites that contain a tropane ring in their chemical structure (see the picture to the right). Tropane alkaloids occur naturally in many members of the plant family Solanaceae.
The main classes of tropane alkaloids are anticholinergics and stimulants, although a few others exist.
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Anticholinergic drugs and deliriants:
All three acetylcholine-inhibiting chemicals can be found in the leaves, stems, and flowers in varying, unknown amounts in the tree-cousin of Datura, (Brugmansiae) more commonly known as Angel Trumpets or Devil's Weed.
Stimulants and cocaine-related alkaloids:
There exist some synthetic analogs of tropane alkaloids, see
They are not considered to be alkaloids per definition.