Objective: To study the chemical constituents of the whole plant of Sphagneticola trilobata.
Methods: The compounds were isolated and purified by column chromatography and their structures were determined by spectroscopic techniques.
Results: Three lignans, two indolics and two phenolic glycosides were isolated from the whole plant of Sphagneticola trilobata and identified as syringaresinol-4-O-β-D-glucopyranoside(1), pinoresinol-4-sulfate(2), pinoresinol-4-O-β-D-glucopyranoside(3), 1H-indole-3-carboxylic acid (4), 1H-indole-3-carbaldehyde(5), 2,6-dimethoxy-4-hydroxyphenol-1-O-β-D-glucopyranoside (6), and 3,5-dimethoxy-4-hydroxyphenol-1-O-β-D-glucopyranoside (7).
Conclusion: Compounds 1 - 7 are isolated from the genus Wedelia for the first time. Compound 4 demonstrates significant inhibitory activity against α-glucosidase.