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Updated: May 9, 2026
High-resolution Tandem Mass Spectrometry for Studying Chemical Constituents of Gynura bicolor DC
Published on: February 2, 2024
[Chemical constituents from the root of Ilex cornuta]
Xi-Xi Zhou1, Qiong-Ming Xu, Ying Zhou
1College of Life Sciences, Guizhou University, Guiyang 550025, China. zhouxinned@yahoo.com.cn
Objective:
To investigate the chemical constituents of the root of Ilex cornuta.
Methods:
The constituents were isolated by silica gel, Sephadex LH-20 gel, medium pressure column and semi-preparative liquid chromatography and their structures were elucidated by chemical properties and spectroscopic analyses.
Results:
Ten compounds were isolated and their structures were identified as: Oleanolic acid (1), Siaresinolic acid (2), 28-O-beta-D-glucopyranosyl pomolic acid (3), Pomolic acid (4), 3beta-O-alpha-L-arabinopyranosyl rotundic acid (5), 3beta-[alpha-L-arabinopyranosyl) oxy]-19alpha-hydroxyolean-12-en-28-oic acid 28-beta-D-glucopyranosyl ester (6), Lup-20(29)-en-3beta,23-diol (7), Chikusetsusaponin IV a butyl ester (8), Oleanolic acid-3-O-( 6'-O-methyl)-beta-D-glucuronopyranoside (9), 3-O-[(alpha-L-arabinopyranosyl)-(1 --> 2)]-beta-D-glucuronopyranosyl-(6'-O-methyl-ester)-olean-12-ene-28-olic acid (10).
Conclusion:
Compounds 7 - 10 are isolated from this genus for the first time, and compounds 2 - 6 are isolated from this plant for the first time.
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For acyclic saturated monocarboxylic acids, the longest hydrocarbon chain containing the –COOH carbon is identified as the parent chain. Then, the last -e of the parent hydrocarbon name is replaced with a suffix -oic acid.