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- W3135256548 abstract "A new neolignan, (-)-(7S, 8R)-3‑methoxy-4', 7-epoxy-8, 5'-neolignane-5, 9, 3', 9′-tetraol (1) and a new biphenylpropanoid, 1, 2-epoxy-1-(3', 4'-dihydroxyphenyl-)-3-(2'', 3'', 5''-trihydroxyphenyl-) propane (2), together with eight known compounds (3-10), were isolated from the 95% EtOH extract of the leaves of Cupressus funebris Endl. Their structures were determined by spectroscopic methods including NMR, circular dichroism (CD) spectra and comparison of the NMR data with reported in references. The antioxidant activities of all compounds were evaluated by DPPH, ABTS, and FRAP methods. Compounds 2 (IC50: 33.98 ± 0.11 μM), 3 (IC50: 32.97 ± 0.63 μM), 8 (IC50: 32.07 ± 1.57 μM), and 9 (IC50: 33.30 ± 2.29 μM) showed stronger DPPH free radical scavenging activity than l-ascorbic acid (IC50: 64.31 ± 1.32 μM). Except for 4, the other compounds showed ABTS radical scavenging abilities comparable to l-ascorbic acid (54.91 ± 1.18 μM) with the IC50 ranged from 24.42 ± 1.78 μM to 138.70 ± 13.58 μM. Compound 3 (0.72 ± 0.02 mmol/g) showed the same ferric reducing antioxidant power (FRAP) as l-ascorbic acid (0.83±0.02 mmol/g)." @default.
- W3135256548 created "2021-03-15" @default.
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- W3135256548 date "2021-07-01" @default.
- W3135256548 modified "2023-09-27" @default.
- W3135256548 title "A new neolignan and a new biphenylpropanoid from the leaves of Cupressus funebris Endl." @default.
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- W3135256548 doi "https://doi.org/10.1016/j.sajb.2021.02.003" @default.
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