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.

Provided is a method for decomposing a flavonoid glycoside, wherein a flavonoid glycoside is decomposed into a flavonoid by heat-treating a flavonoid glycoside-containing raw material in the presence of an alcohol in a sealed container at a temperature exceeding the boiling point of the alcohol under atmospheric pressure.

Provided is a method for decomposing a flavonoid glycoside, wherein a flavonoid glycoside is decomposed into a flavonoid by heat-treating a flavonoid glycoside-containing raw material in the presence of an alcohol in a sealed container at a temperature exceeding the boiling point of the alcohol under atmospheric pressure.

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 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 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 the a process for total synthesis of flavonoid compounds of general formula I and isomers thereof ##STR00001##
wherein R.sub.1 and R.sub.2 is OH; R.sub.3H or ##STR00002## The present invention particularly relates to the process for preparation and separation of (2S,3S)-taxifolin-6-C--D-glucopyranoside (ulmoside A), (2R,3R)-taxifolin-6-C--D-glucopyranoside and taxifolin.

The present invention relates to the a process for total synthesis of flavonoid compounds of general formula I and isomers thereof ##STR00001##
wherein R.sub.1 and R.sub.2 is OH; R.sub.3H or ##STR00002## The present invention particularly relates to the process for preparation and separation of (2S,3S)-taxifolin-6-C--D-glucopyranoside (ulmoside A), (2R,3R)-taxifolin-6-C--D-glucopyranoside and taxifolin.