1、 Diospyros kaki pharmacopoeia standard
. The fruits are picked when they are ripe in winter, collected when they are eaten, washed, and dried in the sun.
[properties] this product is oblate, with a diameter of 1.5 ~ 2.5cm. The center is thick, slightly uplifted, and has a circular scar after the fruit falls off. The edge is thin, 4-lobed, and the lobes are often inverted and fragile; . The outer surface is yellowish brown or reddish brown, and the inner surface is yellowish brown, densely covered with fine villi. It is hard and brittle. The breath is slight and the taste is astringent.
[identification] (1) the powder of this product is brown. The stone cells are long strip-shaped, square like, triangular like or irregular, with a diameter of about 80 μ M. the walls are unevenly thickened, with tumor like protrusions or slightly short branches on the outside, and the pore grooves are very fine and dense. The non glandular hair is a single cell with a diameter of 20-26 μ m and a wall thickness of about 8 μ M. the cell cavity contains brown matter. The outer epidermis cells are square or polygonal, the stomata are indeterminate, and the accessory guard cells are 5-7. The diameter of calcium oxalate square crystal is 5 ～ 20 μ M.
(2) Take 2G of crude powder of this product, add 10ml of 70% ethanol, warm soak for 2 hours, filter, evaporate the filtrate, add 1ml of methanol to dissolve the residue as the test solution. . Test according to thin-layer chromatography (general rule 0502), suck 5 μ l of the test solution and 2 μ l of the control solution, dot them on the same silica gel G thin-layer plate, use toluene (saturated with water) - ethyl formate formic acid (5:4:1) as the developing agent, develop, take out, dry, and spray 1% ferric chloride ethanol solution. In the chromatogram of the test sample, spots with the same color appear at the corresponding position of the chromatogram of the control sample.
[inspection] the moisture content shall not exceed 14.0% (the second method of general rule 0832).
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Decoction pieces
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[identification] [inspection] is the same as that of medicinal materials.
[nature, taste and meridian tropism] bitter, astringent and flat. Return to the stomach meridian.
[functions and indications] depression and depression. For hiccups.
[usage and dosage] 5 ～ 10g.
[storage] store in a ventilated and dry place to prevent moths.

2、 Chemical constituents of Diospyros kaki

Containing 0.37% hydroxytriterpenic acid, includingoleanolic acid （oleanolic acid），Betulinic acid（betulinic acid），Ursolic acid(ursoic acid) and 19 α - hydroxyursolic acid. Other organic acids are stearic acid,palmitic acid（palmitic acid），Succinic acid（succinic acid），Butyric acid（syringic acid），Vanillic acid（vanillic acid），gallic acid（gallic acid）。 In addition, there are friedelin,β - sitosterol， ,Trifolin（trifolin），Hyperin（hyperin），Kaempferol（kaempfer-ol），quercetin （quercetin）。 .

3、

1. antiarrhythmic effect 0.5% persimmon stem extract (st) 50mg/kg was injected intraperitoneally into mice, which could significantly combat chloroform induced ventricular fibrillation; It can also resist arrhythmia induced by aconitine and barium chloride in rats; St12.5mg/ (kg. day) was injected intraperitoneally for 5 consecutive days; It can resist ouabain induced ventricular arrhythmia in guinea pigs.

2. sedative effect st100mg/kg mice were injected intraperitoneally, which significantly reduced spontaneous activity, enhanced the hypnotic effect of subthreshold dose of pentobarbital sodium, prolonged their sleep time, and significantly antagonized morphine induced tail erection reaction in mice.

3. antifertility effect in the screening of family immunity antifertility, it was preliminarily confirmed that the persimmon stalk had certain antifertility effect, and the stem of persimmon stalk was better than the stem of persimmon stalk, and the antifertility rate of the stem of persimmon stalk was 79.6%.