2-Naphthalenecarboxylic acid, 4-(D-glucopyranosyloxy)-1-hydroxy-3-(3-hydroxy-3-methylbutyl)-, methyl ester (compound 3) is a naturally occurring substance found in the dried roots of Rubia cordifolia.
2α,3α,24-Trihydroxyolean-12-en-28-oic acid, a triterpenoid phytoalexin, isolated from peel of unripe fruits of nectarine (Prunus persica cv Fantasia), shows antifungal activity against the fungus mentioned.
Ent-11alpha-Hydroxy-15-oxokaur-16-en-19-oic acid has anti-cancer activity, it induces apoptosis of human malignant cancer cells, it also inhibits hepatocellular carcinoma in vitro and in vivo via stabilizing IkBα.