Iridoids and anthraquinones from the roots of Morinda officinalis

Abstract

Three iridoids, asperulosidic acid (1), geniposidic acid (2), and galioside (3) and three anthraquinones, 2‐hydroxymethyl‐3‐hydroxyanthraquinone (4), rubiadin‐1‐methyl ether (5), and anthragallol‐2‐methyl ether (6) were isolated from the methanol extract of the Morinda officinalis leaves. Their chemical structures were elucidated by ESI‐MS, 1D‐ and 2D‐NMR spectra and comparison with the data reported in the literature. Galioside (3) was reported from Morinda genus for the first time.