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Uncinataflavone, a new flavonoid with a methyl benzoate substituent from Selaginella uncinata
- Zou, Hui, Xu, Kang-Ping, Li, Fu-Shuang, Zou, Zhen-Xing, Long, Hong-Ping, Li, Guang, Wang, Hui, Tan, Gui-Shan
- Journal of Asian natural products research 2013 v.15 no.4 pp. 408-412
- 2,2-diphenyl-1-picrylhydrazyl, Selaginella uncinata, antioxidant activity, flavonoids, nuclear magnetic resonance spectroscopy, spectral analysis
- Uncinataflavone (1), a new flavonoid, together with four known compounds (2–5), was isolated from Selaginella uncinata (Desv.) Spring. Compounds 2 and 3 were isolated from the genus selaginella for the first time. The structure of the new compound was determined as methyl 3-(5,7-dihydroxy-2-(4-hydroxyphenyl)-4-oxo-4H-chromen-6-yl)-4-methoxybenzoate by means of spectroscopic evidence, including UV, IR, 1D and 2D NMR analyses as well as HR-ESI-MS. These compounds (1–5) were evaluated for the antioxidant activity in 1,1-diphenyl-2-picrylhydrazyl assay system.