Carbohydr Polym. 2018 Oct 1;197:515-523.
Chemical structure and anti-inflammatory effect of polysaccharide extracted from Morinda citrifolia Linn (Noni).
Sousa SG, Oliveira LA, de Aguiar Magalhães D, et al.

The chemical structure of a specific polysaccharide from noni was determined.  This polysaccharide was found to have anti-inflammatory and pain reducing activities in animals. (original abstract available at