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One new sesquiterpene and one new iridoid derivative from Valeriana amurensis
- Yang-Guo Xie, Xin-Cai Zhao, Syed Shams ul Hassan, Xiao-Yong Zhen, Ishaq Muhammad, Shi-kai Yan, Xing Yuan, Hui-liang Li, Hui-zi Jin
- Phytochemistry letters 2019 v.32 pp. 6-9
- Valeriana, X-ray diffraction, anti-inflammatory activity, inhibitory concentration 50, irradiation, macrophages, nitric oxide, sesquiterpenoids, spectral analysis, stereochemistry
- One new sesquiterpene 1S, 3S, 4S, 7S 3,4-dihydroxy-bisabolol (1), one new iridoid amurensin A (2) and 10 known compounds were isolated from the whole plants of Valeriana amurensis. Their structures were established on the basis of extensive spectroscopic analysis and the absolute stereochemistry of compound 1 was assigned by X-ray diffraction analysis with Cu-Kα irradiation. All of compounds were evaluated for their inhibitory effects on NO production in LPS-induced RAW264.7 macrophages. Compound 12 displayed significant anti-inflammatory activity with IC50 value of 1.97 μM.