4-epi-Withaferin A
4-epi-Withaferin A (compound 28) is the analogue of Withaferin A. 4-epi-Withaferin A enhances cytotoxicity and cytoprotective heat-shock-inducing activity (HSA). 4-epi-Withaferin A has the potential for the research of protein aggregation-associated diseases by stimulating cellular defense mechanisms[1].