Wiktionary
protopanaxatriol
n. (context organic compound English) A terpene sapogenin, related to dammarane, found in ginseng
Wikipedia
Protopanaxatriol
Protopanaxatriol (PPT) is an organic compound characterizing a group of ginsenosides. It is a dammarane-type tetracyclic triterpene sapogenins found in ginseng (Panax ginseng) and in notoginseng (Panax pseudoginseng).