Related Experiment Video
Updated: Jul 14, 2026
High-resolution Tandem Mass Spectrometry for Studying Chemical Constituents of Gynura bicolor DC
Published on: February 2, 2024
Two new xanthones isolated from the stem bark of Garcinia lancilimba
Nian-Yun Yang1, Quan-Bin Han, Xin-Wei Cao
1Chinese Medicine Laboratory, Hong Kong Jockey Club Institute of Chinese Medicine, Hong-Kong, PR China.
Abstract:
Two new xanthones, 1,5,6-trihydroxy-6',6'-dimethyl-2H-pyrano(2',3':3,4)-2-(3-methylbut-2-enyl)xanthone (1) and 1,6,7-trihydroxy-6',6'-dimethyl-2H-pyrano(2',3':3,2)-4-(3-methylbut-2-enyl)xanthone (2), have been isolated from the stem bark of Garcinia lancilimba (Guttiferae), together with six known xanthones. Their structures were identified on the basis of extensive spectral evidence including detailed 2D NMR and HR-MS data. Two new compounds showed moderate inhibitory effect on human breast cancer MDA-MB-435S cell line.