Researchers identified five new alkaloids and ten known analogues in Lycopodiastrum casuarinoides, a plant commonly used in traditional Chinese medicine to improve cognitive function. Spectroscopic techniques were used to determine the structures of the novel compounds and their absolute configurations. Only huperzine C showed moderate inhibitory activity against acetylcholinesterase, which is associated with Alzheimer's disease. The study highlights the potential of Lycopodiastrum casuarinoides as a source for developing new drugs to treat cognitive impairment.
Researchers have isolated four new alkaloids and ten known analogues from the whole plant of Lycopodiastrum casuarinoides. The new compounds' structures were determined using a variety of spectroscopic and chemical methods. Notably, compound 4 was a lycopodium alkaloidal glycoside never before reported. Four of the isolated compounds showed significant inhibitory activity against acetylcholinesterase, which is linked to Alzheimer's disease. The structure-activity relationships were discussed, potentially informing future treatments.