Senkyunolide C is a natural product, that can be isolated from the rhizome of Cnidium officinale[1].
References
[1] Tran HNK, et al. Anti-inflammatory activity of compounds from the rhizome of Cnidium officinale. Arch Pharm Res. 2018 Oct;41(10):977-985. DOI:10.1007/s12272-018-1048-9