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phenolic constituents with Antioxidative,Tyrosinase Inhibitory and Anti‑aging Activities from Dendrobium loddigesii Rolfe

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Natural Products and Bioprospecting 2019年第5期9卷 329-336页

作者： Rui-Jing Ma Liu Yang Xue Bai Jin-Yu Li Ming-Yan Yuan Ya-Qin Wang Yong Xie Jiang-Miao Hu Jun Zhou State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunming 650201People’s Republic of China College of Pharmacy Guilin Medical UniversityGuilin 541004People’s Republic of China R&D Center of Dr.Plant Kunming Institute of BotanyChinese Academy of SciencesKunming 650201People’s Republic of China

Aqueous ethanol extracts of powdered stems of Dendrobium loddigesii afforded three new phenolics including threo-7-Oethyl-9-O-(4-hydroxyphenyl)propionyl-guaiacylglycerol(1),(R)-4,5,4ʹ-trihydroxy-3,3ʹ,α-trimethoxybibenzyl(2)and(S)-5,5′,7-trihydroxy-3′,4′-dimethoxyflavanone(3),together with eleven known *** structures were determined by extensive spectroscopic *** identify natural antioxidants,whitening,and anti-aging agents,the abilities of these phenolics were assessed to scavenge the 1,2-diphenyl-2-picrylhydrazyl(DPPH)radical,their abilities to inhibit tyrosinase production,and their abilities to stimulate collagen production by human dermal fibroblasts-adult(HDFa)*** was found that compounds 1,4-8,13 and 14 exhibited significant DPPH radical scavenging activities,compound 10 exhibited tyrosinase inhibitory activity(IC_(50)37.904μg/mL),and compound 9 showed significant collagen production with an EC_(50)value of 3.182μg/*** results suggest that phenolic constituents from *** may be candidate antioxidants,skin-whitening and/or anti-aging agents.

关键词： Dendrobium loddigesii phenolic constituents Antioxidative Tyrosinase inhibitory Anti-aging

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Phenanthrenes,anthraquinones,and phenolic constituents from Sinomenium acutum

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Journal of Chinese Pharmaceutical Sciences 2017年第6期26卷 440-446页

作者：吕海宁赵明波姜勇屠鹏飞北京大学医学部药学院天然药物及仿生药物国家重点实验室北京100191

A phytochemical investigation on the stems and rhizomes of Sinomenium acutum led to the isolation of 19 compounds, including three phenanthrenes, six anthraquinones, and ten phenolic derivatives. The structures of the isolated compounds were elucidated by analysis of the MS and NMR spectroscopic data and comparison with the literature. Compounds 1 and 2 are two new natural products, and their 1H and 13C NMR spectral data were fully assigned for the first time, with the help of2D NMR. All of the isolates were obtained from genus Sinomenium for the first time and the phenanthrene and anthraquinone are the structure type first reported from this genus plants.

关键词： Sinomenium acutum Phenanthrenes Anthraquinones phenolic constituents

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