Takemoto Yushi Kabushiki Kaisha

Asai Germanium Research Institute

Mitsuo Namiki

Toshihiko Osawa

Yasuko Fukuda

Norihiro Kakimoto

Tatsuhiko Ozaki

Kohei Miyao

Minoru Isobe

A new synthetic antioxidant comprising an organogermanium compound represented by the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are one of a hydrogen atom, a substituted or unsubstituted phenyl group or an alkyl group, Y is a hydroxyl or amino group and Z is an oxygen or sulfur atom, is particularly effective in inhibiting auto-oxidation in living organisms.

Antioxidant

An active antioxydant containing a compound shown by structural formula ##STR1## is produced by applying an acid catalyst to sesamolin substantially in the absence of active hydrogen compounds.

Method of producing active antioxidant

Antioxidant organogermanium compound

Phenol-type natural antioxidative materials containing analogs of sesamin or sesamolin are manufactured by processing a processed sesame speed product with an acid catalyst and subsequently condensing and separating the desired materials by a physical means such as extraction, distillation and adsorption. By qualitative analysis, the phenol-type natural antioxidative material thus concentrated and separated by a method of the present invention is found to contain analogs of sesamin (A, B and C) and sesamolin (D) having the following chemical structures: ##STR1##

Method of producing phenol-type natural antioxidative materials from

This invention relates to a lignan compound having antioxidative characteristics, an antioxidant having this lignan compound as active component, and antioxidants having as active component a product which contains this lignan compound and is obtained by causing .beta.-glucosidase to react with crushed sesame seeds or a solvent extract thereof.

Growing community of inventors

Aichi, Japan

Mitsuo Namiki