chemical composition
Roots containing anthraquinones: rubiadin, rubiadin-1-methyl ether, physcion, 2-hydroxyhydroxymethyl hydrazine (2-hydroxy-3-hydroxymethylanthraquinone), 1-hydroxyanthraquinone, 1-hydroxy-2-methyl anthraquinone, 1,6-bis Hydroxy-2,4-dimethoxyanthraquinone (1,6-dihydroxy-2,4-dimethoxyan-thraquinone), 1,6-dihydroxy-2-methoxystilbene (1,6-dihydroxy-2 -methoxyanthraquinone) 2-methylanthraquine, also containing the iridoid component; monoTCMLIBopein, asperuloside teTCMLIBacetate. Glucose, mannose, β-sitosterol, and palmitic acid are also included. Vitamin C, nonadecane, 24-ethyl cholesterol.
The root bark contains reducing sugars, glycosides, cardiac glycosides, flavonoids, triterpenoids, amino acids, and organic acids; it also contains 23 metal elements such as potassium, calcium, and magnesium, of which 15 are essential trace elements. The content of lead in the root bark was lower than that in the wood core, and the contents of 16 kinds of trace elements such as iron, manganese, and zinc were higher than that of the wood core.
Four components were isolated from the root bark of the natural medicinal barley from Guangdong, identified as β-sitosterol, 2-methylguanidine, methyl isoorientin-1-methyl ether and 24-ethylcholesterol. The quinone compounds isolated from the chloroform extract of Morinda officinalis are: 1,6-Dihydroxy-2,4-dimethoxyan-thraquinone (1,6-Dihydroxy-2,4-dimethoxyan-thraquinone),1 ,6-Dihydroxy-2-methoxyanthraquinone etc.
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