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    Natural Products

    Natural products refer to the constituents or metabolites of animals, plant extracts (abbreviated as plant extracts) or insects, marine organisms and microorganisms, as well as many endogenous chemical components in humans and animals, collectively referred to as natural products, of which the main Including proteins, peptides, amino acids, nucleic acids, various enzymes, monosaccharides, oligosaccharides, polysaccharides, glycoproteins, resins, colloids, lignin, vitamins, fats, fats, waxes, alkaloids, volatile oils, flavonoids, glycosides , Terpenes, phenylpropanoids, organic acids, phenols, quinones, lactones, steroids, tannic acids, antibiotics and other naturally occurring chemical components.

    Quinone Ring

    Quinone rings are a class of chemical components with quinoid structure in traditional Chinese medicine. They are mainly divided into four types: benzoquinone, naphthoquinone, phenanthrenequinone, and anthraquinone. Anthraquinone and its derivatives are particularly important in Chinese medicine. Quinone rings are widely distributed in plants.

    Sesquiterpene

    The sesquicarbonyl group (sesquiterpene) refers to a natural alkyl compound containing 15 carbon atoms in the molecule and contains three isoprene units. It has various stacking structures such as chain and ring. Uncle sesqui is mostly liquid and mainly exists in the volatile oil of plants. Oxygen derivatives such as alcohols, ketones and lactones are also widely present in volatile oils.

    Iridoid Derivatives

    Iridoids are derivatives of monoterpenes and occur usually, but not invariably, as glycosides. Iridoids and their glycoside derivatives are commonly found in a number of species of this genus including H. diffusa, H. hedyotidea, H. chrysotricha and H. corymbosa.

    Alkaloids

    Alkaloids exist in nature (mainly plants, but some also exist in animals), a type of nitrogen-containing basic organic compounds, which have alkaloid-like properties. According to the basic structure of alkaloids, it can be divided into about 60 categories. Main types: organic amines, pyrrolidines, pyridines, isoquinolines, indoles, scopolamines, imidazoles, quinazolones, purines, steroids, diterpenes, and others.
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