Fifteen Months
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According to the structure of the ligands, the structure of the ligands can be phenols, anthraquinones, flavonoids, and other compounds. For example, flavone and anthraquinone ligands, etc.
According to the solubility of the ligands: the ligands can be divided into water-soluble and fat-soluble ligands. Water-soluble ligands are usually soluble in polar solvents such as water and ethanol, while fat-soluble ligands are less soluble in water and more soluble in organic solvents.
According to the form of existence of the ligands, the ligands can be divided into primary and secondary ligands. Primary ligands are those that contain several sugar molecules originally existing in plants, while secondary ligands are those that produce fewer sugar molecules after hydrolysis of primary ligands.
According to the function of ligands: ligands can be divided into physiologically active ligands and inactive ligands. The ligands with physiological activity, such as saponins and flavonoid sides, have certain physiological functions in plants, such as anti-oxidation, anti-inflammation, anti-tumor, etc.