Related Experiment Video
Updated: Jul 14, 2026

Cultivation of the Marine Pelagic Tunicate Dolioletta gegenbauri (Uljanin 1884) for Experimental Studies
Published on: August 9, 2019
[Studies on constituents of Oldenlandia diffusa]
Ying-Jun Zhou1, Kong-Song Wu, Guang-Yao Zeng
1Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Central South University, Changsha 410013, China. yingjun-zhou@hotmail.com
Objective:
To investigate the chemical constituents of Oldenlandia diffusa.
Method:
The column chromatography with polyamide Sephadex LH -20, silica gel as packing materials and HPLC, were used to separate and purify the chemical components. The structures were elucidated on the basis of physicochemical properties and spectral data.
Result:
Nine compounds were isolated and identified as 2, 6-dihydroxy-1-methoxy-3-methylanthraquinone (1), 2-hydroxy-1-methoxy-3-methylanthraquinone (2), 2-hydroxy-3-methylanthraquinone (3), quercetin-3-O-[2-O-(6-O-E-sinapoyl)-beta-D-glucopyranosyl]-beta-glucopyranoside (4), quercetin-3-O-[2-O-(6-O-E-feruloyl)-beta-D-glucopyranosyl]-beta-glucopyranoside (5), kaempferol-3-O-[2-O-(6-O-E-feruloyl)-beta-D-glucopyranosyl]-beta-galactopyranoside (6), quercetin-3-O-(2-O-beta-D-glucop-yranosyl)-beta-D-glucopyranoside (7), rutin (8) and quercertin (9).
Conclusion:
Compounds 1 and 8 were obtained from this plant for the first time, and compound 1 was a new compound.
Related Concept Videos
Other Algae
Green Algae
Overview of Algae
Red Algae
Diversity of Protists III
