Tropane is a bicyclic organic compound. It is mainly known for the other derived from it, which include atropine and cocaine, among others. Tropane alkaloids occur in of the families Erythroxylaceae (including coca) and Solanaceae (including mandrake, henbane, deadly nightshade, datura, potato, tomato).
Structurally, tropane is cycloheptane with a nitrogen bridge between carbons 1 and 5 and an additional methyl group attached to the nitrogen. While carbons 1 and 5 are asymmetric carbons, tropane itself is optically inactive due to mirror symmetry.
8-Azabicyclo3.2.1octane (tropane without the N-methyl group) is known as nortropane or nor-tropane.
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