Robuta

https://pubmed.ncbi.nlm.nih.gov/33049649/ Ecdysteroids from the underground parts of Rhaponticum acaule (L.) DC In addition to two known ecdysteroids, 20-hydroxyecdysone and turkesterone, three previously undescribed stigmastane-type ecdysteroids were isolated from the... from theundergroundpartsldc