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Study on the inhibitory effect of tannins and flavonoids against the 1,1-diphenyl-2 picrylhydrazyl radical.
- T. Yokozawa, C. Chen, E. Dong, T. Tanaka, G. Nonaka, I. Nishioka
- Chemistry, Medicine
- Biochemical pharmacology
- 15 July 1998
Fifty-one tannins and forty-one flavonoids isolated from Oriental medicinal herbs were evaluated for their antioxidant ability with a 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical-generating system.… Expand
Biosynthesis of cannabinoid acids
Abstract Malonic acid, mevalonic acid, geraniol and nerol were incorporated into tetrahydrocannabinolic acid and cannabichromenic acid in Cannabis sativa. The pathway from cannabigerolic acid to… Expand
Antitumor agents, 129. Tannins and related compounds as selective cytotoxic agents.
- Y. Kashiwada, G. Nonaka, I. Nishioka, J. Chang, K. Lee
- Biology, Medicine
- Journal of natural products
- 1 August 1992
Fifty-seven tannins and related compounds, including gallotannins, ellagitannins, and condensed and complex tannins, were evaluated for their cytotoxicities against human tumor cell lines, including… Expand
Tannins and Related Compounds. CXIX. Samarangenins A and B, Novel Proanthocyanidins with Doubly Bonded Structures, from Syzygium samarangens and S. aqueum
Two proanthocyanidins named samarangenins A (1) and B (2) have been isolated, together with a variety of flavan-3-ols, proanthocyanidins and hydrolyzable and complex tannins, from the leaves of… Expand
Biosynthesis of propyl cannabinoid acid and its biosynthetic relationship with pentyl and methyl cannabinoid acids
Abstract Biosynthesis of propyl cannabinoid acid has been determined by in vitro incubation with a crude enzyme solution from three strains of Cannabis sativa using 14 C-labelled cannabinoid acid.… Expand
Somatic Embryogenesis and Clonal Multiplication of Panax ginseng.
Embryogenesis of PANAX GINSENG was induced from young flower buds via callus during a 3 months culture period. Matured embryos could be germinated on the 1/2 Murashige and Skoog's medium supplemented… Expand
Studies on Epimedium species : flavonol glycosides and isozymes
Abstract Flavonol glycosides, icariin, epimedin B and C, contained in six Epimedium species were qualitatively and quantitatively analysed by HPLC. Significant differences in the flavonol glycoside… Expand
Tannins and related compounds. XV. A new class of dimeric flavan-3-ol gallates, theasinensins A and B, and proanthocyanidin gallates from green tea leaf (1)
Along with four dimeric proanthocyanidin gallates, viz. prodelphinidin B-2 3'-O-gallate (IV) and procyanidins B-2 3, 3'-di-O-gallate (V), B-2 3'-O-gallate (VI) and B-4 3'-O-gallate (VII), two novel… Expand
Magnesium and Ammonium-Potassium Lithospermates B, the Active Principles Having a Uremia-Preventive Effect from Salvia miltiorrhiza
The active components which exhibit the improving effect on uremic symptoms have been isolated from Salviae miltriorrhizae Radix and characterized as magnesium lithospermate (1) and… Expand
Flavan-3-ol and proanthocyanidin allosides from Davallia divaricata
Abstract Four flavan-3-ol glycosides and three proanthoeyanidin glycosides have been isolated from the fern, Davallia divaricata , together with procyanidins B-1 and B-2 and a trimeric procyanidin.… Expand