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Botanical Name |
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Rheum palmatum L. |
English
Name |
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Chinese rhubarb, Medicinal rhubarb, Turkish rhubarb |
Family |
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Polygonaceae |
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General Info
Description |
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A large, erect, perennial herb, up to 2.5 m tall; rhizome and roots thick, branched, almost fleshy, bright yellow. Leaves partly in a radical rosette, partly spirally arranged on an erect stem; leaves of rosette borne on a thick, subcylindrical petiole, up to 30 cm long, blade orbicular, 50—90 cm x 50—70 cm, base cordate, deeply palmately lobed, 3—5-veined, lobes ovate-oblong or lanceolate, apex acute, entire, dentate or pinnatifid, upper surface normally rough; ocrea large, membranaceous. Inflorescence a loose, hairy panicle with racemiform branches, foliated to the tip; flowers bisexual, fascicled; tepals in 2 whorls of 3, mostly red, sometimes pink or whitish, little or not accrescent after anthesis; stamens 9; ovary trigynous, styles 3, recurved, stigmas thick. Fruit a trigonous nutlet, 10 mm x 8 mm, brown, much longer than perianth, 3-winged, scarious. |
Herb Effects |
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Anticholesterolemic, antiseptic, antispasmodic, antitumor, aperient, astringent, anti-inflammatory, anti-hypertensive, antitumour, cholagogue, demulcent, diuretic, laxative, purgative, stomachic and tonic (root). |
Chemistry
Active Ingredients |
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Aloe-emodin, chrysophanol, cinnamic acid, emodin, gallic acid, hyperin, physcion, quercitrin, rhein (root) |
Chemistry
of Active Ingredients |
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Name |
CAS# |
IUPAC Name |
Formula |
Structure |
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Aloe-emodin |
481-72-1 |
1,8-dihydroxy-3-(hyd roxymethyl)anthracen e-9,10-dione |
C15H10O5 |
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Chrysophanol |
Not Available |
1,8-dihydroxy-3-meth yl-anthracene-9,10-d ione |
C15H10O4 |
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Cinnamic acid |
63938-16-9 |
3-phenylprop-2-enoic acid |
C9H8O2 |
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Emodin |
Not Available |
1,3,8-trihydroxy-6-m ethyl-anthracene-9,1 0-dione |
C15H10O5 |
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Gallic acid |
149-91-7 |
3,4,5-trihydroxybenz oic acid |
C7H6O5 |
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Hyperin |
482-36-0 |
2-(3,4-dihydroxyphen yl)-4,5-dihydroxy-3- [3,4,5-trihydroxy-6- (hydroxyme
thyl)oxa n-2-yl]oxy-chromen-7 -one |
C21H20O12 |
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Physcion |
521-61-9 |
1,8-dihydroxy-3-meth oxy-6-methyl-anthrac ene-9,10-dione |
C16H12O5 |
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Quercitrin |
6151-25-3 |
2-(3,4-dihydroxyphen yl)-4,5-dihydroxy-3- (3,4,5-trihydroxy-6- methyl-oxa
n-2-yl)o xy-chromen-7-one |
C21H20O11 |
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Rhein |
Not Available |
4,5-dihydroxy-9,10-d ioxo-anthracene-2-ca rboxylic acid |
C15H8O6 |
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Pharmacology
Medicinal Use |
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Employed in a pure form or as part of a mixture against constipation, dysentery, swollen gums, sore throat, sores, furuncles, freckles, burns, jaundice, strangury and after childbirth (rhizome); used as constituents of slimming cures, spring time tonics and blood purifying teas (rhizome extracts); taken internally in the treatment of chronic constipation, diarrhoea, liver and gall bladder complaints, haemorrhoids, menstrual problems and skin eruptions due to an accumulation of toxins (root) |
Contraindication |
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It should not be taken in cases of intestinal obstruction, stenosis, atony, inflammatory colon diseases, appendicitis and haemorrhoids. It should be avoided also during pregnancy. Long-term use should be avoided, as it may result in aggravation of constipation, in albuminuria, liver damage and haematuria. |
Dealers
Products
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