2-Hydroxy-3-(hydroxymethyl)anthraquinone exhibits quinone reductase (QR)- inducing activity in Hepa lclc7 cells, with the concentration required to double QR activity of 0.94 microM.

Damnacanthal possesses anti-cancer, immunomodulatory, antinociceptive and anti-inflammatory actions, it can treat or prevent hepatocellular carcinoma through its inhibitory effects on the HGF/c-Met axis.

1. Monotropein (Monotropeine) has antinociceptive action. 2. Monotropein has anti-apoptosis and anti-catabolic activity in chondrocytes. 3. Monotropein has anti-inflammatory action by inhibition of the expressions of inflammatory mediators via NF-κB inactivation, and support its possible therapeutic role in colitis. 4. Monotrope ininhibit the expressions of inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), tumor necrosis factor-α (TNF-α), and interleukin-1β (IL-1β) mRNA in LPS-induced RAW 264.7 macrophages.

Tectoquinone exhibits strong mosquito larvicidal activity.

3-hydroxymorindone is a natural product from Morinda citrifolia. 3-hydroxymorindone is a pigment.

1,5,15-Tri-O-methylmorindol has effects against the Epstein-Barr virus early antigen (EBV-EA) activation induced by TPA.