Related Experiment Video
Updated: Jun 20, 2026
High-resolution Tandem Mass Spectrometry for Studying Chemical Constituents of Gynura bicolor DC
Published on: February 2, 2024
[Studies on the chemical comstituents of Pithecellobium clypearia]
Miao-Xian Su1, Zhi-Yue Tang, Wei-Huan Huang
1The Chinese University of Hong Kong, N. T., Hong Kong, China.
Objective:
To study the chemical constituents of Pithecellobium clypearia.
Methods:
The compounds were isolated from Pithecellobium clypearia with column chromatography. Their structures were characterized on the basis of their physical and chemical preperties, as well as chromatographic and spectroscopic evidences.
Results:
A pair of isomeric flavans consisting of 7, 3'-O-di-gallyoltricetiflavan (I) and 7,4'-O-di-gallyoltricetiflavan (II), along with a catechin compound (-)-epigallocatechin-7-O-gallate (III) were isolated from the leaves and twigs of Pithecellobium clypearia.
Conclusion:
Compound I is a new flavan. Compound III is isolated from Pithecellobium genus for the first time, and its 13C-NMR data is firstly given in the present study.
