Vinaginsenoside R4, isolated from the leaves of hydroponic Panax ginseng. It has an inhibitory effect on melanin biosynthesis without any cytotoxic effects on the melan-a cells, and enhances the depigmentation on the zebrafish[1].
[1]. Lee DY, et al. The potential of minor ginsenosides isolated from the leaves of Panax ginseng as inhibitors of melanogenesis. Int J Mol Sci. 2015 Jan 13;16(1):1677-90.