Chamigrenal is a natural product that can be extract from the fruits of Schisandra sphenanthera[1].
References
[1] Yao-Ching Tsai, et al. Seven new sesquiterpenoids from the fruits of Schisandra sphenanthera. Chem Biodivers. 2014 Jul;11(7):1053-68. DOI:10.1002/cbdv.201300259