Rush grass
1、 Standard for herbal medicine of Lantern heart       This product is the dried stem pith of Juncus effusus L., a plant of the family junceae. From late summer to autumn, cut the stem, dry it, take out the stem pith, straighten it, and tie it into a small handful.
      [properties] this product is thin cylindrical, 90cm long, 0.1 ~ 0.3cm in diameter. The surface is white or yellowish white, with fine longitudinal lines. It is light, soft, slightly elastic, easy to break, and has a white section. The air is weak and the taste is light.
      [identification] (1) the powder of this product is white. .
      (2) Take 1g of the product powder, add 100ml of methanol, heat and reflux for 1 hour, cool it, filter it, evaporate the filtrate to dryness, wash the residue with 2ml of ether, discard the ether solution, add 1ml of methanol to dissolve it, and use it as the test solution. Another 1g of the reference medicinal material of rush was prepared into the reference medicinal material solution by the same method. Test according to thin-layer chromatography (general rule 0502), suck 3-5 µ l of the test solution and 3 µ l of the control medicinal material solution, respectively dot them on the same silica gel G thin-layer plate, use cyclohexane ethyl acetate (10:7) as the developing agent, develop, take out, air dry, spray 10% phosphomolybdic acid ethanol solution, heat at 105 ℃ until the spots are clear. In the chromatogram of the test sample, the main spot with the same color appears at the position corresponding to the chromatogram of the control medicinal material.
      [check] moisture   .
      Total ash   .
      [extract] take 0.5g of this product and determine it according to the hot leaching method under the determination method of alcohol soluble extract (general rule 2201), using dilute ethanol as solvent, which shall not be less than 5.0%.
      Decoction pieces
      [processing] rushes   Remove impurities and cut sections.
      Wick charcoal   Remove the rushes and make charcoal according to the charcoal burning method (general rule 0213).
      This product is a thin cylindrical segment. The surface is black. . The breath is slight and the taste is slightly astringent.
      [nature, taste and meridian tropism] sweet, light and slightly cold. Return to heart, lung and small intestine channels.
      [functions and indications] clear the heart and fire, and facilitate urination. It is used for upset insomnia, less urine, astringent pain, and sore mouth and tongue.
      [usage and dosage] 1 ～ 3G.
      [storage] put it in a dry place.
2、 Chemical constituents of rush grass
The stem pulp contains a variety of phenanthrene derivatives, which have been isolated as follows: juncusol, juncusos,JUNCAO phenol（juncunol）， 2,6-dihydroxy-1,7-dimethyl-5-vinyl-9,10-dihydrophenanthrene, 2,7-dihydroxy-1,8-dimethyl-5-vinyl-9,10-dihydrophenanthrene, 2,8-dihydroxy-1,6-dimethyl-5-ethylene 2,8-dihydroxy-1,6-dimethyl-5-ethyl-9,10-dihydrophenanthrene, 8-hydroxy-2-methoxy-1,6-dimethyl-5-vinyl 9,10-Dihydrophenanthrene, 2-hydroxy-7-methoxy-1,8-dimethyl-5-ethyl-9,10-dihydrophenanthrene, 2-hydroxy-7-carboxy-1-methyl-5-vinyl-9,10-dihydrophenanthrene, 2-hydroxy-8-carboxy-1-methyl-5-ethyl-9,10-dihydrophenanthrene,5-vinyl-9,10-dihydrophenanthrene, 2, 3-dihydroxy-1,7-dimethyl-5-vinyl-9,10-dihydrophenanthrene), juncunone, 5-formyl-2-hydroxy-1,8-dimethyl-7-methoxy-9,10-dihydrophenanthrene, 5-methyl acyl-2,6-hydroxy-1,7-dimethyl-9,10-dihydrophenanthrene (5-formyl-2,6-dihydroxy-1,7-dimethyl-9, 10-dihydrophenanthrene）， 5- (1-hydroxyethyl) - 2,6-dihydroxy-1,7-dimethyl-9,10-dihydrophenanthrene [(1-hydroxyyl) - 2,6-dihydroxy-1,7-dimethyl-9,10-dihydrophenanthrene], 5- (1-methoxyethyl) - 2,6-dihydroxy-1,7-dimethyl 9,10-Dihydrophenanthrene [5- (1-methoxyyl) - 2,6-dihydroxy-1,7-dimethyl-9,10-dihydrophenanthrene], 5- (1- hydroxyethyl) - 2,8-dihydroxy-1,7-dimethyl-9,10-dihydrophenanthrene [5- (1-hydroxy) -2, 8-dihydroxy-1，7-dimethyl-9，10-dihydrophenanthrene]， 2,6-dihydroxy-1,7-dimethyl-9,10-dihydrophenanthrene, dehydroeffusol, dehydroeffusal, dehydrojuncusol. It also contains 2,8-dihydroxy-1,7-dimethyl-5-vinyl-10,11-dihydrodibenzo [b, F] oxaheptane (2,8-dihydroxy-1,7-dimethyl-6-ethyl-10,11-dihydrodibenz [b, F] - oxepin), α - mono-p-coumaroyl glyceride,Luteolin（luteolin）。 Linalool（lonalool）, 2-undecanone, 2-tridecanone, p-menth-4-en-3-one, 1,2-dihydro-1,5,8-trimethylnaphthalene, α - and β - ionone, β - bisabolene, β - phenylethanol, phenol, p-cresol), 6,10,14-trimethylpentadecanone-2-one,Eugenol（eugenol）， Dihydroactinidiolide,α - cyperone（α-cyperone），Vanillin（vanillin）， Capric acid, lauric acid,Myristic acid（myristic acid）， Stearic acid, oleic acid, linoleic acid, and C12 to C24 hydrocarbons. It also contains phenylalanine, Norvaline,L-Methionine （L-methionine），L-tryptophanAmino acids such as L-tryptophane, β -alanine, tripeptide composed of two molecules of glutamic acid and one molecule of valine, and sugars such as glucose, galactose, Arabian, xylan and methylpentosan. Also containsLuteolin, luteolin7 glucoside,β - sitosterolβ - sitosterol and β - sitosterol glucoside, etc.

3、 Pharmacological effects of wick herbs
Experiments have proved that this product has diuretic and hemostatic effects.