Phytochemical constituents ofCoix lachryma-jobivar.ma-yuenroots and their tyrosinase inhibitory activity
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Chemical Constituents from Apios americana and Their Inhibitory Activity on Tyrosinase.
The goal of this study was to identify phytochemicals with inhibitory activity against tyrosinase. Nine compounds 1-9 were isolated from the tubers of Apios americana. This is the first report of aromadendrin 5-methyl ether (1) being isolated from the Apios species. Among them, compounds 2 and 8 showed inhibitory activity toward tyrosinase. Based on a Dixon plot, the potential Ki values of comp...
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Five new naturally occurring monoterpenoids, crocusatins-A (1), -B (2a), -C (3), -D (4a) -E (5), a new lactate, sodium (2S)-(O-hydroxyphenyl)lactate (6), and eighteen known compounds were isolated and characterized from the pollen of Crocus sativus L. The tyrosinase inhibitory activities of these compounds were also discussed.
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The n-hexane (HE), dichloromethane (DC), methanol (ME), ethanol 70% (ET), and methanol with Soxlhet apparatus (MS) extracts of Stachys lavandulifolia aerial parts were screened for their potential tyrosinase, acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitory activity. ET and MS inhibited tyrosinase with IC50 values of 33.4 and 42.8 μg/mL, respectively. The phytochemical in...
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Hyper-pigmentation of the skin is a common problem that is prevalent in middle aged and elderly people. It is caused by over production of melanin. Tyrosinase is known to be the key enzyme in melanin production. Ethanolic extract of Greyia flanaganii leaves showed significant (P<0.05) antityrosinase activity exhibiting the IC₅₀ of 32.62 μg/ml. The total extract was further investigated for its ...
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In the course of our work into the use of cane by-products, we have studied the isolation and structural determination of bioactive compounds in sugarcane molasses. In this study, three stereo isomers of syringyl glycerol 3'-O-beta-D-glucopyranoside, three stereo isomers of guaiacyl glycerol 3'-O-beta-D-glucopyranoside, a syringyl glycerol 2'-O-beta-D-glucopyranoside, tachioside and a 2,3-dihyd...
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ژورنال
عنوان ژورنال: Journal of Applied Biological Chemistry
سال: 2017
ISSN: 1976-0442,2234-7941
DOI: 10.3839/jabc.2017.009