guaiacin/machilus

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Neuroprotective lignans from the bark of Machilus thunbergii.

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Prijava / prijava

The CH (2)Cl (2) fraction of the bark of Machilus thunbergii Sieb. et Zucc. (Lauraceae) significantly protected primary cultures of rat cortical cells exposed to the excitotoxic amino acid, L-glutamate. (-)-Isoguaiacin, meso-dihydroguaiaretic acid, machilin A, (+)-galbelgin, licarin A, (-)-sesamin,

Stimulatory activity of lignans from Machilus thunbergii on osteoblast differentiation.

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Prijava / prijava

Phytoestrogens are naturally occurring compounds exerting estrogenic activity, and include isoflavonoids, flavonoids and lignans. In the present study, we evaluated the stimulating activity of six lignans, meso-dihydroguaiaretic acid, nordihydroguaiaretic acid, machilin A, guaiacin, isoguaiacin and

Biological evaluation of secondary metabolites from the root of Machilus obovatifolia.

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Prijava / prijava

Bioassay-guided fractionation of the root of Machilus obovatifolia led to the isolation of four new lignans, epihenricine B (1), threo-(7'R,8'R) and threo-(7'S,8'S)-methylmachilusol D (2 and 3), and isofragransol A (4), along with 23 known compounds. The compounds were obtained as isomeric mixtures

Chemical constituents of the bark of Machilus wangchiana and their biological activities.

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Prijava / prijava

Eleven new metabolites, butanolides 1-6, lignan derivatives 7-9, sesquiterpene 10, and 3',4'-seco-flavane derivative 11, have been isolated from an ethanol extract of Machilus wangchiana. Twenty known compounds, including ginkgolides A and B (16 and 17), were also isolated. Their structures and

[Lignans from Machilus robusta].

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Prijava / prijava

Eighteen lignans were isolated from an ethanol extract of Machilus robusta by a combination of various chromatographic techniques including column chromatography over silica gel, Sephadex LH-20 and reversed-phase HPLC. Their structures were identified by spectroscopic data analysis as

[Chemical constituents from roots of Machilus yaoshansis].

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Prijava / prijava

To study chemical constituents contained in ethanol extracts from roots of Machilus yaoshansis. Fifteen compounds were separated from the roots of M. yaoshansis by using various chromatographic techniques. Their structures were identified on the basis of their physicochemical properties and spectral

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