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(20)R-Protopanaxadiol is a sapogenin that has been found in P. ginseng and has anticancer and antibacterial activities. It has a cytotoxic concentration (CC₅₀) value of 6.1 μM in MT-4 human T cell leukemia cells and inhibits the growth of several additional cancer cell lines, including A549 human lung carcinoma, SKOV3 human ovarian adenocarcinoma, SK-Mel-2 human melanoma, P388 and L1210 murine leukemia, and K562 human chronic leukemia cells (ED₅₀s = 11-26 μM). (20)R-protopanaxadiol also inhibits the growth of H. pylori in vitro (MICs = 50-100 μg/ml).

20(R)-Protopanaxdiol is a saponin ginsenoside which is a signature phytochemical of Ginseng, an herbaceous plant. Anti-cancer agent.

ChEBI: A diastereomer of protopanaxadiol in which the 20-hydroxy substituent has been introduced at the pro-R position.