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-Azabicyclo[3.2.1]octane (tropane without the N-methyl group) is known as nortropane or nor-tropane.
^"Atropine content of plants". USDA, ARS, National Genetic Resources Program. Phytochemical and Ethnobotanical Databases. [Online Database] National Germplasm Resources Laboratory, Beltsville, Maryland. Archived from the original on November 7, 2004. Retrieved July 25, 2005.
^"Cocaine content of plants". USDA, ARS, National Genetic Resources Program. Phytochemical and Ethnobotanical Databases. [Online Database] National Germplasm Resources Laboratory, Beltsville, Maryland. Archived from the original on November 7, 2004. Retrieved July 25, 2005.