(±)-Huperzine A is an active Lycopodium alkaloid extracted from traditional Chinese herbs. (±)-Huperzine A is a selective and reversible inhibitor of AChE and can be used in studies about the treatment of Alzheimer's disease.

(-)-Huperzine A (HupA) , an active Lycopodium alkaloid extracted from the traditional Chinese herb, is a potent, selective and reversible acetylcholinesterase (AChE) inhibitor and has been widely used in China for the treatment of Alzheimer's disease (AD).

Huperzine has the value as pretreatment of organophosphate poisoning, it can be used as a protective agent against organophosphate intoxication.

1. Huperzine-B is a efficient inhibitor of human brain AChE. 2. Huperzine-B can enhance ognitive and protect neuro, may be potentially new drug candidates for Alzheimer's disease therapy.