Provided is a method for decomposing a flavonoid glycoside, wherein a flavonoid glycoside-containing raw material is hydrothermally treated to decompose a flavonoid glycoside into a flavonoid.

The present invention provides a plant-based flavonoid pharmaceutical composition and its synthetic for inhibition of phosphau'dylinositol-4-kinases and consequent prevention and treatment of RNA viruses including but not limited to viral hepatitis, as well as activity against cancer, malaria, autoimmune disorders and inflammation, prevent organ transplant rejection and as a radiation sensitizer. A method for isolating specific plant-based flavonoid pharmaceutical compositions from raw plant material as well as a method for synthesizing the compositions are also disclosed.

The present invention relates to compounds of formula (II)

##STR00001##

useful in the treatment of many diseases such as a skin disease, an allergy, an autoimmune disease, a cardiovascular disease, a lung disease, asthma, a bacterial, viral or parasitic disease, metabolic syndrome, cancer, Alzheimer's disease or diabetes and are furthermore useful in the preparation of cosmetics and for use in food and animal feed.

A method for extracting and separating dihydromyricetin from rattan tea, which belongs to the technical field of natural medicine extraction and separation, includes: 1) weighing rattan tea leaves, then adding solvent thereto, stirring and refluxing to extract, filtering, keeping on refluxing extraction of residue, and combining extract; 2) adding activated carbon to the extract, performing decolorization, filtering, retaining the filtrate, and then concentrating the filtrate; and 3) crystallizing the concentrated filtrate, filtering, and washing the crystals with cold water and vacuum drying. The method has simple process, high yield and stability, and is easy to realize industrialized production.

A method for extracting and separating dihydromyricetin from rattan tea, which belongs to the technical field of natural medicine extraction and separation, includes: 1) weighing rattan tea leaves, then adding solvent thereto, stirring and refluxing to extract, filtering, keeping on refluxing extraction of residue, and combining extract; 2) adding activated carbon to the extract, performing decolorization, filtering, retaining the filtrate, and then concentrating the filtrate; and 3) crystallizing the concentrated filtrate, filtering, and washing the crystals with cold water and vacuum drying. The method has simple process, high yield and stability, and is easy to realize industrialized production.

A compound having antihypertensive activity, especially 5-deoxy-irilin B having angiotensin-I-converting enzyme inhibition activity, derived from Salicornia SPP., a salty sauce containing the same, and a composition for the prevention and treatment of hypertension containing the same are provided. The Salicornia SPP.-derived salty sauce having superior sensory and functional properties can be produced through cutting or grinding and then hydrolyzing of Salicornia SPP. alone, thus increasing the amounts of polyphenols, which is effective in the treatment of hypertension, and glutamic acid, which is responsible for a savory taste; through purification, thus improving sensory properties such as removal of unpleasant tastes and odors and decoloration; and through concentration under reduced pressure, thus exhibiting both a savory taste and a salty taste, and can also be efficiently utilized as functional foods and medications for the prevention of hypertension and cardiovascular disease, and contains large amounts of organic nutrients and is thus nutritionally useful.

A compound having antihypertensive activity, especially 5-deoxy-irilin B having angiotensin-I-converting enzyme inhibition activity, derived from Salicornia SPP., a salty sauce containing the same, and a composition for the prevention and treatment of hypertension containing the same are provided. The Salicornia SPP.-derived salty sauce having superior sensory and functional properties can be produced through cutting or grinding and then hydrolyzing of Salicornia SPP. alone, thus increasing the amounts of polyphenols, which is effective in the treatment of hypertension, and glutamic acid, which is responsible for a savory taste; through purification, thus improving sensory properties such as removal of unpleasant tastes and odors and decoloration; and through concentration under reduced pressure, thus exhibiting both a savory taste and a salty taste, and can also be efficiently utilized as functional foods and medications for the prevention of hypertension and cardiovascular disease, and contains large amounts of organic nutrients and is thus nutritionally useful.

The invention provides methods of hair loss or inducing new hair growth, as well as methods of preventing hair loss, comprising applying an effective amount of a dihydromyricetin compound to the scalp. The invention also provides methods of delaying or reversing signs of aging skin comprising applying an effective amount of a dihydromyricetin compound to the skin. Also provided are cosmetic products (e.g., skin and hair products) comprising a dihydromyricetin compound and methods of making the same.

The invention provides methods of hair loss or inducing new hair growth, as well as methods of preventing hair loss, comprising applying an effective amount of a dihydromyricetin compound to the scalp. The invention also provides methods of delaying or reversing signs of aging skin comprising applying an effective amount of a dihydromyricetin compound to the skin. Also provided are cosmetic products (e.g., skin and hair products) comprising a dihydromyricetin compound and methods of making the same.

The present invention relates to a method for isolating flavonoids such as cochlioquinone or chrysoeriol from a rice plant inoculated with a whitebacked planthopper. The method of the present invention, for example, facilitates not only the fast production of flavonoids such as cochlioquinone or chrysoeriol but also the mass-production of flavonoids such as cochlioquinone or chrysoeriol with high efficiency in addition to the advantage of saving costs. Therefore the method of the present invention can be effectively used for the production of flavonoids such as cochlioquinone or chrysoeriol and also be used in various fields using the same.