Novel use of flavone-based compound
A technology for flavonoids and uses, which is applied in the field of new uses of flavonoids and can solve problems such as easy to cause chemical changes, sensitivity and the like
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Embodiment 1
[0127] Manufacture of the ethanol extract of kaempferia floret
[0128] After pulverizing rhizomes of Kaempferia florets with a mixer, 100 g of the crushed Kaempferia florets samples were put into 1 L of ethanol, soaked at room temperature for 48 hours and extracted. The extracted sample was filtered with Whatman No. 2 filter paper, and the filtered extract was concentrated with a vacuum rotary concentrator, and the solvent component was removed to obtain the ethanol extract of Kaempferia floret.
Embodiment 2
[0130] Isolation and Structure Determination of 5,7-Dimethoxyflavone
[0131] Separation of 5,7-dimethoxyflavone
[0132] The concentrated kaempferia floret ethanol extract obtained in the above was loaded on a 6x15cm column filled with silica gel, using a solvent system in which ethyl acetate and methanol were mixed at a ratio of 10:0.5 (v / v) Separation is carried out, and according to the above separation sequence, it is separated into a total of 5 components, and each component is concentrated and dried. The third fraction (component 3) in the 5 fractions was chromatographed by Rp-18 column Merck&Co., USA) was separated with 70% methanol, and separated into a total of 2 components according to the above separation sequence and concentrated and dried. Load the second component (component 3-2) of the above two components in a 6x15cm column filled with silica gel, and use ethyl acetate and methanol at a ratio of 10:0.4 (v / v) The mixed solvent system is separated, and f...
Embodiment 3
[0138] Isolation and structure determination of 5,7,4'-trimethoxyflavone
[0139] Separation of 5,7,4'-trimethoxyflavone
[0140] The concentrated kaempferia floret ethanol extract obtained in the above was loaded on a 6x15cm column filled with silica gel, using a solvent system in which ethyl acetate and methanol were mixed at a ratio of 10:0.5 (v / v) to separate. According to the above separation sequence, it was separated into a total of 5 components, and each component was concentrated and dried. Using Rp-18 column chromatography Merck & Co., USA) separated the fourth component (component 4) among the five components with 70% methanol as the eluting solvent. Separation was performed using 70% methanol as the elution solvent. According to the above separation sequence, it was separated into a total of 2 components and concentrated to dryness. Finally, the second component (component 4-2) is concentrated and dried, and the pure active substance for improving skin wr...
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