Syringa oblata
1、       This product is the dried and nearly mature fruit of Eugenia caryophyllata thunb., a Myrtle plant. The fruit will be picked when it is ripe and dried in the sun.
      [properties] the product is oval or long oval, 1.5 ~ 3cm long and 0.5 ~ LCM in diameter. The surface is yellowish brown or brownish brown with fine wrinkles; There are four persistent sepals bending inward into a hook shape at the top; ; The peel and kernel can be peeled off, and the kernel is formed by two cotyledons, brown or dark brown, oily, with an obvious longitudinal groove in the center; There are embryos inside, which are thin rod-shaped. It is hard to break. It is fragrant and spicy.
      . Starch grains are numerous, single long oval, shell like, round like or irregular, with a diameter of 14-35 µ m. There are many fibers, in bundles or scattered individually, yellowish brown, mostly in long spindle shape, with a diameter of 9-41 µ M. stone cells are scattered individually or in groups, yellowish brown, in long strip, triangular like or irregular shape, occasionally branched, with a diameter of 14-88 µ m, dense laminations and obvious pore grooves. Calcium oxalate cluster crystals exist in parenchyma cells with a diameter of 7-43 µ M. small square crystals of calcium oxalate are occasionally seen. The oil chamber is often broken.
      (2) Take 1.5g of this product powder, add 5ml of ether, shake for several minutes, filter, and take the filtrate as the test solution. Take another 1.5g of the reference medicinal material of Syringa oblata and prepare the reference medicinal material solution by the same method. Then take eugenol reference substance and add ether to make a solution containing 0.5mg per 1ml as the reference substance solution. According to the test of thin-layer chromatography (general rule 0502), suck 5 µ 1 each of the above three solutions, dot them on the same silica gel G thin-layer plate, use petroleum ether (60 ～ 90 ℃) - ethyl acetate (9:1) as the developing agent, develop, take out, dry, spray 5% vanillin sulfuric acid solution, heat at 105 ℃ until the spots are clear. In the chromatogram of the test sample, spots with the same color appear at the corresponding positions of the chromatogram of the control medicinal material and the chromatogram of the control sample.
      ; Not more than 12.0% (the fourth method of general rule 0832).
      Total ash   Not more than 4.0% (general rule 2302).
      [extract] according to the hot leaching method under the determination method of alcohol soluble extract (general rule 2201), the use of ethanol as solvent shall not be less than 15.0%.
      [content determination] determine according to HPLC (general rule 0512).
      ; Octadecylsilane bonded silica gel was used as filler; Methanol water (65:40) was used as mobile phase; The detection wavelength was 280nm. The number of theoretical plates should not be less than 3000 according to the eugenol peak.
      Preparation of reference solution   Take an appropriate amount of eugenol reference substance, weigh accurately, add absolute ethanol to make a solution containing 0.1mg per 1ml.
      Preparation of test solution   Take about 0.3g of this product powder (through No. 2 screen), weigh it accurately, put it into a 25ml measuring bottle, add absolute ethanol to the scale, soak it for 24 hours, shake it well, filter it, and take the filtrate.
      Assay   Precisely suck 10 µ l of the control solution and 10 µ l of the test solution respectively, inject them into the liquid chromatograph, and determine.
      The content of eugenol (C10H12O2) shall not be less than 0.65% according to the calculation of dry products.
      Decoction pieces
      [processing] remove impurities and mash them in time.
      [identification], [inspection], [extract], [content determination] are the same as those of medicinal materials.
      . Return to spleen, stomach, lung and kidney meridians.
      [functions and indications] it can warm the middle and reduce adverse reactions, tonify the kidney and help Yang. .
      .
      [note] it should not be used with Curcuma.
      [storage] store in a cool and dry place.


2、 Chemical constituents of Syringa oblata
Eugenol, α - dusonene, cubonene, β - dusoneneα - caryophyllene、β - caryophyllene, allomyrcene, cedrene, δ - junipineneSinapic acid, carvacrolPiperine.

3、 Pharmacological effects of Syringa oblata
Dispersing cold in warm weather; . The Lord is angry and painful; Stomach cold vomiting; Cold toothache; Dentition; Bad breath; The woman is cold and gloomy; Pediatric hernia