Feretoside, a phenolic compound extracted from the barks of E. ulmoides, is a HSP inducer which act as cytoprotective agent.
The barks of Eucommia ulmoides (Eucommiae Cortex, Eucommiaceae) have been used as a traditional medicine in Korea, Japan, and China to treat hypertension, reinforce the muscles and bones, and recover the damaged liver and kidney functions. Feretoside increases expression of HSF1 by a factor of 1.214, 1.144, 1.153, 1.114, 1.159, 1.041, and 1.167 at 3 mm, respectively[1].
[1]. Nam JW, et al. Heat shock factor 1 inducers from the bark of Eucommia ulmoides as cytoprotective agents. Chem Biodivers. 2013 Jul;10(7):1322-7.