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Biosynthesis of a Flavonol from a Flavanone by Establishing a One-pot Bienzymatic Cascade
Published on: August 14, 2019
Antioxidant flavonoids from the rhizomes of Helminthostachys zeylanica
Yu-Ling Huang1, Pei-Yu Yeh, Chien-Chang Shen
1National Research Institute of Chinese Medicine, No. 155-1, Sec. 2, Li Nung St. Peitou, Taipei, Taiwan, Republic of China.
Phytochemistry
|November 6, 2003
Abstract:
Eight flavonoids, ugonins E-L (1-8), were isolated from the rhizomes of Helminthostachys zeylanica, and their structures were established on the basis of spectral evidence. Compounds 3-8 were evaluated for their antioxidative activity in the 1, 1-diphenyl-2-picrylhydrazyl (DPPH) assay. Compounds 6, 7 and 8 were more active than Trolox, with IC20 values of 5.29 +/- 0.32, 7.23 +/- 0.22, and 7.93 +/- 0.31, respectively.
