chemical composition
Rehmannia glutinosa contains relatively small amounts of iridoid steroids and has been isolated: leonuride, aucubin, catalpol, rehmannioside A, B, C, D , Melittoside, rehma-glutin A, D, glutinoside, etc. It also contains monoterpene: Jioglutin (jioglut
Rehearsal
In) A, B, C, jigoglutolide, jiofuran, rehm acrocinin, etc. It also contains amino acids. Its composition is comparable to that of Radix Rehmanniae. It does not contain lysine and its content is reduced accordingly. It also contains sugars, in which the content of monosaccharides is more than 2 times higher than that of Radix Rehmanniae. Also contains trihydroxy-β-lonone, dihydroxy-p-lonone, aeginetic acid, and sec-hydroxyaeginetic acid. ) Succinic acid, 5-oxoproline, 5-hydroxymethylfuroic acid, uracil, uridine, and the like. Separated from petroleum ether extracts: linoleic acid, palmitic acid, stearic acid, arachidic acid, be-henic acid, Pentadecanoic acid, palmitoleic acid, myristic acid, nonadecan Oic acid, heneicosanoic acid, margaric acid. Physical and chemical identification:
Take this product powder 1g, add ethanol 10ml, soak for 24 hours, filtered, the filtrate as a test solution. Another 5-hydroxymethylfurfural reference product, add ethanol to make a solution containing 0.5mg per 1ml as a reference solution. 10 μl of the test solution and 5 μl of the reference solution were spotted on the same silica gel GF254 thin-layer plate, and ethyl acetate (1:1) was used as a developing solvent in petroleum ether (60-90° C.), expanded, removed, and dried. , view under UV light (254nm). In the chromatogram of the test sample, the spots of the same color appear on the positions corresponding to the chromatogram of the reference substance.
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