Caudatin is one of the species of C-21 steroidal glycosides mainly isolated from the root of Cynanchum bungei Decne and exhibits potent anticancer activities.
Qingyangshengenin B (Otophylloside B) is a C-21 steroidal glycoside isolated from Qingyangshen. Qingyangshengenin B protects against Aβ toxicity, which decreases Aβ deposition by decreasing the expression of Aβ at the mRNA level. Qingyangshengenin B has antiepileptic and anti-aging effects, it can extend lifespan, increase heat stress-resistance, delay body paralysis, and increase the chemotaxis response in C. elegans models of Alzheimer's disease. Otophylloside B can suppress the seizure-like locomotor activity caused by pentylenetetrazole in zebrafish.
2,3-Dihydroxy-4-methoxyacetophenone (2',3'-Dihydroxy-4'-methoxyacetophenone) is a natural product,it improves cognitive function and may be helpful for the treatment of Alzheimer's disease.