Rhodionin, isolated from the root of Rhodiola crenulata, is a specific non-competitive cytochrome P450 2D6 inhibitor with an IC50 of 0.761 μM and a Ki of 0.769 μM[1]. Rhodionin exhibits potent, dose-dependent inhibitory effects on acetylcholinesterase (AChE) with IC50 ranged from 57.50 to 2.43 μg/mL[2]. Rhodionin exhibits potent DPPH free radical scavenging activities, with an IC50 of 19.49 μM[3].
References:
[1]. Xu W, et al. Two potent cytochrome P450 2D6 inhibitors found in Rhodiola rosea. Pharmazie. 2013 Dec;68(12):974-6.
[2]. Li FJ, et al. Molecular interaction studies of acetylcholinesterase with potential acetylcholinesterase inhibitors from the root of Rhodiola crenulata using molecular docking and isothermal titration calorimetry methods. Int J Biol Macromol. 2017 Nov;104(Pt A):527-532.
[3]. Choe KI, et al. The antioxidant and anti-inflammatory effects of phenolic compounds isolated from the root of Rhodiola sachalinensis A. BOR. Molecules. 2012 Sep 27;17(10):11484-94.