Tropane alkaloids are a class of naturally occurring chemical compounds that contain a tropane ring structure. They are primarily found in certain plants, particularly in the Solanaceae family, which includes species like belladonna and henbane. These compounds are known for their pharmacological effects, including anticholinergic properties, which can influence the nervous system. Common tropane alkaloids include atropine and scopolamine, both of which have medicinal uses. Atropine is often used to treat bradycardia and as an antidote for certain types of poisoning, while scopolamine is used to prevent motion sickness. Due to their potent effects, these alkaloids must be used with caution.