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4. Minor triterpenes from an aqueous extract of the hook-bearing stem of Uncaria rhynchophylla.

Author

Li, Ruo-Fei, Guo, Qing-Lan, Zhu, Cheng-Gen, Xu, Cheng-Bo, Wei, Ya-Zi, Cai, Jian, Wang, Yue, Sun, Hua, Zhang, Tian-Tai, and Shi, Jian-Gong

Subjects
TERPENES, HERBAL medicine, MEDICINAL plants, HIGH performance liquid chromatography, ORGANIC compounds, NUCLEAR magnetic resonance spectroscopy, ANTINEOPLASTIC agents, PLANTS, PHYTOCHEMICALS, PLANT stems, DESCRIPTIVE statistics, MASS spectrometry, RESEARCH funding, TUMOR necrosis factors, MOLECULAR structure, BIOLOGICAL assay, CELL lines, CHINESE medicine, OPTICS, PHARMACODYNAMICS, DRUG administration, DRUG dosage
Abstract

Six new triterpenes, uncarinic acids KP (1–6), along with 24 known analogues, were isolated as minor constituents of an aqueous decoction of the hook-bearing stems of Uncaria rhynchophylla (Gou-teng). By comprehensive spectroscopic data analysis, their structures were elucidated as derivatives of olean-12-en-28-oic acid and urs-12-en-28-oic acid with different oxidized forms at C-3, C-6, and/or C-23, respectively. Cell-based preliminary bioassay showed that the (E)-/(Z)-coumaroyloxy and (E)-/(Z)-feruloyloxy units at C-27 of olean-12-en-28-oic acid and urs-12-en-28-oic acid played roles in their bioactivities. [ABSTRACT FROM AUTHOR]

Published
2021
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