Food Chem. 2008 Nov 15;111(2):526-9.
Simultaneous characterization and quantitation of flavonol glycosides and aglycones in noni leaves using a validated HPLC-UV/MS method.
Deng S, West BJ, Jensen CJ.

An analytical method was developed to determine the concentrations of four flavonoids found in Morinda citrifolia leaves. The contents of the rutin, kaempferol-3-O-a-l-rhamnopyranosyl-(1→6)-b-d-glucopyranoside, quercetin, and kaempferol in the noni leaves varied from 1.16 to 371.6mg/100g dry weight.  (view original abstract at