Medicinal clove and ornamental clove are two completely different plants. Medicinal clove is a dicotyledonous plant of Myrtaceae, which tastes warm and spicy. The efficacy is to warm the middle warmer, warm the kidney and reduce adverse reactions. Indications include hiccup, vomiting, nausea, dysentery, chills, addiction, hernia, tinea, etc. Location: Tanzania, Malaysia, Indonesia and other places. It is cultivated in Guangdong and Guangxi in China. The flower buds contain volatile oil, namely clove oil. The oil mainly contains eugenol, acetoeugenol and β -caryophyllene.
And methyl n-amyl ketone, methyl salicylate, humulone, benzaldehyde, benzyl alcohol, m-methoxybenzaldehyde, benzyl acetate, piperonal, α-ylanene, etc. There are also wild varieties that do not contain eugenol (64-85% in common clove oil), but contain eugenol ketone and eugenol. These flowers also contain triterpenoids, such as oleanolic acid, flavonoids, rhamnetin, kaempferol and cherubin.
Syringin, Isosyringin and their demethylated compounds Isosyringin. The dry bud is slightly short and rod-shaped, with a length of 1.5 ~ 2 cm, reddish brown to dark brown; The lower part is a cylindrical slightly flat calyx tube, with a length of 1 ~ 1.3 cm, a width of about 5 mm and a thickness of about 3 mm. The base gradually narrows, the surface is rough, and there is oil oozing from it. There are four triangular thick calyxes on the upper end of calyx tube. The upper part is nearly spherical, about 6 mm in diameter, with 4 petals, embracing each other. When the flower buds are cut open, we can see that most stamens bend towards the center, and there is a thick and straight style in the center, which is solid and heavy and sinks into the water.
The cut surface is glossy, and oil can be seen oozing from nails; Strong fragrance and pungent taste. It is best to be big, stout, bright purple-brown, fragrant and oily.