Iridoid constituents from the ant plant Hydnophytum formicarum

Abstract

Using various chromatographic methods, four iridoids namely asperulosidic acid (1), deacetylasperulosidic acid (2), 6α-hydroxygeniposide (3), and 10-hydroxyloganin (4), were isolated from the methanol extract of the ant plant Hydnophytum formicarum. The structural elucidation was done using 1D and 2D-NMR experiments and comparison of the NMR data with reported values. This is the first report of these compounds from H. formicarum.