1: Zhu Y, Wang P, Zhao Y, Yang C, Clark A, Leung T, Chen X, Sang S. Synthesis, evaluation, and metabolism of novel [6]-shogaol derivatives as potent Nrf2 activators. Free Radic Biol Med. 2016 Jun;95:243-54. doi: 10.1016/j.freeradbiomed.2016.03.026. Epub 2016 Mar 25. doi: 10.1002/ptr.5574. Epub 2016 Feb 3. doi: 10.1371/journal.pone.0137614. eCollection 2015. 4: Ghasemzadeh A, Jaafar HZ, Rahmat A. Optimization protocol for the extraction of 6-gingerol and 6-shogaol from Zingiber officinale var. rubrum Theilade and improving antioxidant and anticancer activity using response surface methodology. BMC Complement Altern Med. 2015 Jul 30;15:258. doi: 10.1186/s12906-015-0718-0. 5: Peng S, Yao J, Liu Y, Duan D, Zhang X, Fang J. Activation of Nrf2 target enzymes conferring protection against oxidative stress in PC12 cells by ginger principal constituent 6-shogaol. Food Funct. 2015 Aug;6(8):2813-23. doi: 10.1039/c5fo00214a. Epub 2015 Jul 14. doi: 10.1142/S0192415X15500469. Epub 2015 Jun 28. doi: 10.1016/j.ejphar.2015.06.032. Epub 2015 Jun 20. doi: 10.1016/j.phymed.2015.03.016. Epub 2015 Apr 9. doi: 10.1021/acs.jafc.5b00002. Epub 2015 Feb 25. doi: 10.1016/j.ejmech.2015.01.035. Epub 2015 Jan 20. doi: 10.1002/mnfr.201400791. Epub 2015 Mar 16.