Harmalol hydrochloride is a β-carboline alkaloid that can be extracted from the seeds of Peganum harmala L. Harmalol hydrochloride is the major metabolite of Harmaline and significantly inhibits dioxin-mediated induction of CYP1A1 at both transcriptional and post-translational levels.

甲酰肽受体 1 (FPR1) 的拮抗剂。减少 fMLF 诱导的超氧化物产生，EC50 为 0.63 μM。几乎完全阻断 fMLF 刺激的初级颗粒胞吐作用。

Eupalinolide K 是一种天然产物。